magento2 – Custom module in Magento 2: templet error

I'm doing the front-end form in Magento 2, but I sucked this error, anyone can help me, please.
down is my code
in app / code / My / Module / Block / Contact.php

<? php

My  Module  Block namespace;

Contact class extends  Magneto  Framework  View  Element  Template
{
/ **
* Build
*
* @param  Magento  Framework  View  Element  Template  Context $ context
* @param array $ data
* /
public function __constructed (
 Magento  Backend  Block  Template  Context $ context,
array $ data = []
)
{
parent :: __ construct ($ context, $ data);
}

/ **
* Get URL action form for POST reservation request
*
* @return string
* /
Public function getFormAction ()
{
// companymodule is given in route.xml
// controller_name is the name of the folder inside the driver folder
// action is the name of the php file inside the previous controller_name folder

return & # 39; / mymodule / index / contact & # 39 ;;
// here controller_name is index, action is reserving
}
}

in app / code / My / Module / Controller / index / Contact.php

getRequest () -> getPost ();

if (! empty ($ post)) {
// Retrieve your form data
$ firstname = $ post['firstname'];
$ lastname = $ post['lastname'];
$ phone = $ post['phone'];
$ email = $ post['email'];

// Doing something with ...

// Show the validation message of the success form
$ this-> messageManager-> addSuccessMessage (& # 39; Submmition done! & # 39;);

// Redirect to your form page (or wherever you want ...)
$ resultRedirect = $ this-> resultFactory-> create (ResultFactory :: TYPE_REDIRECT);
$ resultRedirect-> setUrl (& # 39; / mymodule / index / stream_context_create () & # 39;);

returns $ resultRedirect;
}
// 2. GET request: Render the contact page
$ this -> _ view-> loadLayout ();
$ this -> _ view-> renderLayout ();
}
}

in app / code / My / Module / etc / frontend / route.xml




    
        
    


in app / code / My / Module / etc / module.xml





in app / code / My / Module / view / frontend / layout / mymodule_index_contact.xml




    HTML Title - The contact form page.


    
    
        
    

             

in app / code / My / Module / view / frontend / templets / contact.phtml

Contact page

<form action = "getFormAction ()?> "method =" post ">

in app / code / My / Module / view / frontend / registration.php

<? php
 Magento  Framework  Component  ComponentRegistrar :: register (
 Magento  Framework  Component  ComponentRegistrar :: MODULE,
& # 39; My_module & # 39 ;,
__DIR__
);

And the error in the browser are

1 exception (s):
Exception # 0 (Magento  Framework  Exception  ValidatorException): Invalid template file: & # 39; My_Module :: contact.phtml & # 39; in the module: & # 39; My_Module & # 39; Block name: & # 39; mymodule_contact & # 39;

Exception # 0 (Magento  Framework  Exception  ValidatorException): Invalid template file: & # 39; My_Module :: contact.phtml & # 39; in the module: & # 39; My_Module & # 39; Block name: & # 39; mymodule_contact & # 39;
# 1 Magento  Framework  View  Element  Template -> _ toHtml () called in [lib/internal  /Magento/Framework/View/Element/AbstractBlock.php:668]
# 2 Magento  Framework  View  Element  AbstractBlock-> toHtml () called in [lib/internal/Magento/Framework/View/Layout.php:557]
# 3 Magento  Framework  View  Layout -> _ renderBlock () called in [lib/internal/Magento/Framework/View/Layout.php:533]
# 4 Magento  Framework  View  Layout-> renderNonCachedElement () called in [generated/code/Magento/Framework/View/Layout/Interceptor.php:206]
# 5 Magento  Framework  View  Layout  Interceptor-> renderNonCachedElement () called in [lib/internal/Magento/Framework/View/Layout.php:488]
# 6 Magento  Framework  View  Layout-> renderElement () called in [generated/code/Magento/Framework/View/Layout/Interceptor.php:193]
# 7 Magento  Framework  View  Layout  Interceptor-> renderElement () called in [lib/internal/Magento/Framework/View/Layout.php:585]
# 8 Magento  Framework  View  Layout -> _ renderContainer () called in [lib/internal/Magento/Framework/View/Layout.php:535]
# 9 Magento  Framework  View  Layout-> renderNonCachedElement () called in [generated/code/Magento/Framework/View/Layout/Interceptor.php:206]
# 10 Magento  Framework  View  Layout  Interceptor-> renderNonCachedElement () called in [lib/internal/Magento/Framework/View/Layout.php:488]
# 11 Magento  Framework  View  Layout-> renderElement () called in [generated/code/Magento/Framework/View/Layout/Interceptor.php:193]
# 12 Magento  Framework  View  Layout  Interceptor-> renderElement () called in [lib/internal/Magento/Framework/View/Layout.php:585]
# 13 Magento  Framework  View  Layout -> _ renderContainer () called in [lib/internal/Magento/Framework/View/Layout.php:535]
# 14 Magento  Framework  View  Layout-> renderNonCachedElement () called in [generated/code/Magento/Framework/View/Layout/Interceptor.php:206]
# 15 Magento  Framework  View  Layout  Interceptor-> renderNonCachedElement () called in [lib/internal/Magento/Framework/View/Layout.php:488]
# 16 Magento  Framework  View  Layout-> renderElement () called in [generated/code/Magento/Framework/View/Layout/Interceptor.php:193]
# 17 Magento  Framework  View  Layout  Interceptor-> renderElement () called in [lib/internal/Magento/Framework/View/Layout.php:585]
# 18 Magento  Framework  View  Layout -> _ renderContainer () called in [lib/internal/Magento/Framework/View/Layout.php:535]
# 19 Magento  Framework  View  Layout-> renderNonCachedElement () called in [generated/code/Magento/Framework/View/Layout/Interceptor.php:206]
# 20 Magento  Framework  View  Layout  Interceptor-> renderNonCachedElement () called in  [lib/internal/Magento/Framework/View/Layout.php:488]
# 21 Magento  Framework  View  Layout-> renderElement () called in [generated/code/Magento/Framework/View/Layout/Interceptor.php:193]
# 22 Magento  Framework  View  Layout  Interceptor-> renderElement () called in [lib/internal/Magento/Framework/View/Layout.php:585]
# 23 Magento  Framework  View  Layout -> _ renderContainer () called in [lib/internal/Magento/Framework/View/Layout.php:535]
# 24 Magento  Framework  View  Layout-> renderNonCachedElement () called in [generated/code/Magento/Framework/View/Layout/Interceptor.php:206]
# 25 Magento  Framework  View  Layout  Interceptor-> renderNonCachedElement () called in [lib/internal/Magento/Framework/View/Layout.php:488]
# 26 Magento  Framework  View  Layout-> renderElement () called in [generated/code/Magento/Framework/View/Layout/Interceptor.php:193]
# 27 Magento  Framework  View  Layout  Interceptor-> renderElement () called in [lib/internal/Magento/Framework/View/Layout.php:585]
# 28 Magento  Framework  View  Layout -> _ renderContainer () called in [lib/internal/Magento/Framework/View/Layout.php:535]
# 29 Magento  Framework  View  Layout-> renderNonCachedElement () called in [generated/code/Magento/Framework/View/Layout/Interceptor.php:206]
# 30 Magento  Framework  View  Layout  Interceptor-> renderNonCachedElement () called in [lib/internal/Magento/Framework/View/Layout.php:488]
# 31 Magento  Framework  View  Layout-> renderElement () called in [generated/code/Magento/Framework/View/Layout/Interceptor.php:193]
# 32 Magento  Framework  View  Layout  Interceptor-> renderElement () called in [lib/internal/Magento/Framework/View/Layout.php:585]
# 33 Magento  Framework  View  Layout -> _ renderContainer () called in [lib/internal/Magento/Framework/View/Layout.php:535]
# 34 Magento  Framework  View  Layout-> renderNonCachedElement () called in [generated/code/Magento/Framework/View/Layout/Interceptor.php:206]
# 35 Magento  Framework  View  Layout  Interceptor-> renderNonCachedElement () called in [lib/internal/Magento/Framework/View/Layout.php:488]
# 36 Magento  Framework  View  Layout-> renderElement () called in [generated/code/Magento/Framework/View/Layout/Interceptor.php:193]
# 37 Magento  Framework  View  Layout  Interceptor-> renderElement () called in [lib/internal/Magento/Framework/View/Layout.php:954]
# 38 Magento  Framework  View  Layout-> getOutput () called in [lib/internal/Magento/Framework/Interception/Interceptor.php:58]
# 39 Magento  Framework  View  Layout  Interceptor -> ___ callParent () called in [lib/internal/Magento/Framework/Interception/Interceptor.php:138]
# 40 Magento  Framework  View  Layout  Interceptor-> Magento  Framework  Interception  {closing} () called in [lib/internal/Magento/Framework/Interception/Interceptor.php:153]
# 41 Magento  Framework  View  Layout  Interceptor -> ___ callPlugins () called in [generated/code/Magento/Framework/View/Layout/Interceptor.php:494]
# 42 Magento  Framework  View  Layout  Interceptor-> getOutput () called in [lib/internal/Magento/Framework/View/Result/Page.php:258]
# 43 Magento  Framework  View  Result  Page-> render () called in [lib/internal/Magento/Framework/View/Result/Layout.php:171]
# 44 Magento  Framework  View  Result  Layout-> renderResult () called in [lib/internal/Magento/Framework/Interception/Interceptor.php:58]
# 45 Magento  Framework  View  Result  Page  Interceptor -> ___ callParent () called in [lib/internal/Magento/Framework/Interception/Interceptor.php:138]
# 46 Magento  Framework  View  Result  Page  Interceptor-> Magento  Framework  Interception  {closing} () called in [lib/internal/Magento/Framework/Interception/Interceptor.php:153]
# 47 Magento  Framework  View  Result  Page  Interceptor -> ___ callPlugins () called in [generated/code/Magento/Framework/View/Result/Page/Interceptor.php:130]
# 48 Magento  Framework  View  Result  Page  Interceptor-> renderResult () called in [lib/internal/Magento/Framework/App/View.php:221]
# 49 Magento  Framework  App  View-> renderLayout () called in [app/code/My/Module/Controller/Index/Contact.php:40]
# 50 My  Module  Controller  Index  Contact-> execute () called in [generated/code/My/Module/Controller/Index/Contact/Interceptor.php:24]
# 51 My  Module  Controller  Index  Contact  Interceptor-> execute () called in [lib/internal/Magento/Framework/App/Action/Action.php:108]
# 52 Magento  Framework  App  Action  Action-> dispatch () called in [lib/internal/Magento /Framework/Interception/Interceptor.php:58]
# 53 My  Module  Controller  Index  Contact  Interceptor -> ___ callParent () called in [lib/internal/Magento/Framework/Interception/Interceptor.php:138]
# 54 My  Module  Controller  Index  Contact  Interceptor-> Magento  Framework  Interception  {closing} () called in [lib/internal/Magento/Framework/Interception/Interceptor.php:153]
# 55 My  Module  Controller  Index  Contact  Interceptor -> ___ callPlugins () called in [generated/code/My/Module/Controller/Index/Contact/Interceptor.php:39]
# 56 My  Module  Controller  Index  Contact  Interceptor-> dispatch () called in [lib/internal/Magento/Framework/App/FrontController.php:159]
# 57 Magento  Framework  App  FrontController-> processRequest () called in [lib/internal/Magento/Framework/App/FrontController.php:99]
# 58 Magento  Framework  App  FrontController-> dispatch () called in [lib/internal/Magento/Framework/Interception/Interceptor.php:58]
# 59 Magento  Framework  App  FrontController  Interceptor -> ___ callParent () called in [lib/internal/Magento/Framework/Interception/Interceptor.php:138]
# 60 Magento  Framework  App  FrontController  Interceptor-> Magento  Framework  Interception  {closing} () called in [app/code/Magento/Store/App/FrontController/Plugin/RequestPreprocessor.php:94]
# 61 Magento  Store  App  FrontController  Plugin  RequestPreprocessor-> aroundDispatch () called in [lib/internal/Magento/Framework/Interception/Interceptor.php:135]
# 62 Magento  Framework  App  FrontController  Interceptor-> Magento  Framework  Interception  {closing} () called in [app/code/Magento/PageCache/Model/App/FrontController/BuiltinPlugin.php:73]
# 63 Magento  PageCache  Model  App  FrontController  BuiltinPlugin-> aroundDispatch () called in [lib/internal/Magento/Framework/Interception/Interceptor.php:135]
# 64 Magento  Framework  App  FrontController  Interceptor-> Magento  Framework  Interception  {closing} () called in [lib/internal/Magento/Framework/Interception/Interceptor.php:153]
# 65 Magento  Framework  App  FrontController  Interceptor -> ___ callPlugins () called in [generated/code/Magento/Framework/App/FrontController/Interceptor.php:26]
# 66 Magento  Framework  App  FrontController  Interceptor-> dispatch () called in [lib/internal/Magento/Framework/App/Http.php:136]
# 67 Magento  Framework  App  Http-> launch () called in [generated/code/Magento/Framework/App/Http/Interceptor.php:24]
# 68 Magento  Framework  App  Http  Interceptor-> launch () called in [lib/internal/Magento/Framework/App/Bootstrap.php:258]
# 69 Magento  Framework  App  Bootstrap-> run () called in [index.php:39]

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