forums – Xenforo 2.2.1 error

Please help me to fix this error on XF 2.2.1. Thanks!

XFPrintableException: Please enter a valid name.
src/XF/Mvc/Entity/Entity.php:1212
Generated by: Unknown account
Dec 2, 2020 at 12:51 PM
Stack trace‚Äč
#0 src/addons/MD/WC/Service/CrawlerItem/Import.php(50): XFMvcEntityEntity->save()
#1 src/XF/Service/ValidateAndSavableTrait.php(40): MDWCServiceCrawlerItemImport->_save()
#2 src/addons/MD/WC/Cron/Crawler.php(40): MDWCServiceCrawlerItemImport->save()
#3 (internal function): MDWCCronCrawler::checkLastestChapter()
#4 src/XF/Job/Cron.php(34): call_user_func()
#5 src/XF/Job/Manager.php(258): XFJobCron->run()
#6 src/XF/Job/Manager.php(200): XFJobManager->runJobInternal()
#7 src/XF/Job/Manager.php(84): XFJobManager->runJobEntry()
#8 job.php(43): XFJobManager->runQueue()
#9 {main}