Error when create material request

when i create and apply in action button, it give error:

Traceback (most recent call last):
File “/home/erp/erp/apps/frappe/frappe/desk/form/save.py”, line 22, in savedocs
doc.save()
File “/home/erp/erp/apps/frappe/frappe/model/document.py”, line 242, in save
return self._save(*args, **kwargs)
File “/home/erp/erp/apps/frappe/frappe/model/document.py”, line 272, in _save
self.run_before_save_methods()
File “/home/erp/erp/apps/frappe/frappe/model/document.py”, line 723, in run_before_save_methods
self.run_method(“validate”)
File “/home/erp/erp/apps/frappe/frappe/model/document.py”, line 669, in run_method
return Document.hook(fn)(self, *args, **kwargs)
File “/home/erp/erp/apps/frappe/frappe/model/document.py”, line 863, in composer
return composed(self, method, *args, **kwargs)
File “/home/erp/erp/apps/frappe/frappe/model/document.py”, line 848, in runner
add_to_return_value(self, f(self, method, *args, **kwargs))
File “/home/erp/erp/apps/frappe/frappe/email/doctype/email_alert/email_alert.py”, line 104, in trigger_email_alerts
evaluate_alert(doc, alert, eevent)
File “/home/erp/erp/apps/frappe/frappe/email/doctype/email_alert/email_alert.py”, line 163, in evaluate_alert
attachments = [frappe.attach_print(doc.doctype, doc.name)] if alert.attach_print else None)
File “/home/erp/erp/apps/frappe/frappe/init.py”, line 393, in sendmail
send_after=send_after, expose_recipients=expose_recipients, send_priority=send_priority, communication=communication)
File “/home/erp/erp/apps/frappe/frappe/email/queue.py”, line 53, in send
email_account = get_outgoing_email_account(True, append_to=reference_doctype)
File “/home/erp/erp/apps/frappe/frappe/email/smtp.py”, line 54, in get_outgoing_email_account
email_account = get_default_outgoing_email_account(raise_exception_not_set=raise_exception_not_set)
File “/home/erp/erp/apps/frappe/frappe/email/smtp.py”, line 82, in get_default_outgoing_email_account
email_account.password = email_account.get_password()
File “/home/erp/erp/apps/frappe/frappe/model/base_document.py”, line 597, in get_password
return get_decrypted_password(self.doctype, self.name, fieldname, raise_exception=raise_exception)
File “/home/erp/erp/apps/frappe/frappe/utils/password.py”, line 16, in get_decrypted_password
return decrypt(auth[0][0])
File “/home/erp/erp/apps/frappe/frappe/utils/password.py”, line 101, in decrypt
plain_text = cstr(cipher_suite.decrypt(encode(pwd)))
File “/home/erp/erp/env/lib/python2.7/site-packages/cryptography/fernet.py”, line 75, in decrypt
return self._decrypt_data(data, timestamp, ttl)
File “/home/erp/erp/env/lib/python2.7/site-packages/cryptography/fernet.py”, line 119, in _decrypt_data
self._verify_signature(data)
File “/home/erp/erp/env/lib/python2.7/site-packages/cryptography/fernet.py”, line 108, in _verify_signature
raise InvalidToken
InvalidToken

Traceback (most recent call last):
File “/home/erp/erp/apps/frappe/frappe/app.py”, line 55, in application
response = frappe.handler.handle()
File “/home/erp/erp/apps/frappe/frappe/handler.py”, line 19, in handle
execute_cmd(cmd)
File “/home/erp/erp/apps/frappe/frappe/handler.py”, line 36, in execute_cmd
ret = frappe.call(method, **frappe.form_dict)
File “/home/erp/erp/apps/frappe/frappe/init.py”, line 879, in call
return fn(*args, **newargs)
File “/home/erp/erp/apps/frappe/frappe/desk/form/save.py”, line 22, in savedocs
doc.save()
File “/home/erp/erp/apps/frappe/frappe/model/document.py”, line 242, in save
return self._save(*args, **kwargs)
File “/home/erp/erp/apps/frappe/frappe/model/document.py”, line 272, in _save
self.run_before_save_methods()
File “/home/erp/erp/apps/frappe/frappe/model/document.py”, line 723, in run_before_save_methods
self.run_method(“validate”)
File “/home/erp/erp/apps/frappe/frappe/model/document.py”, line 669, in run_method
return Document.hook(fn)(self, *args, **kwargs)
File “/home/erp/erp/apps/frappe/frappe/model/document.py”, line 863, in composer
return composed(self, method, *args, **kwargs)
File “/home/erp/erp/apps/frappe/frappe/model/document.py”, line 848, in runner
add_to_return_value(self, f(self, method, *args, **kwargs))
File “/home/erp/erp/apps/frappe/frappe/email/doctype/email_alert/email_alert.py”, line 104, in trigger_email_alerts
evaluate_alert(doc, alert, eevent)
File “/home/erp/erp/apps/frappe/frappe/email/doctype/email_alert/email_alert.py”, line 163, in evaluate_alert
attachments = [frappe.attach_print(doc.doctype, doc.name)] if alert.attach_print else None)
File “/home/erp/erp/apps/frappe/frappe/init.py”, line 393, in sendmail
send_after=send_after, expose_recipients=expose_recipients, send_priority=send_priority, communication=communication)
File “/home/erp/erp/apps/frappe/frappe/email/queue.py”, line 53, in send
email_account = get_outgoing_email_account(True, append_to=reference_doctype)
File “/home/erp/erp/apps/frappe/frappe/email/smtp.py”, line 54, in get_outgoing_email_account
email_account = get_default_outgoing_email_account(raise_exception_not_set=raise_exception_not_set)
File “/home/erp/erp/apps/frappe/frappe/email/smtp.py”, line 82, in get_default_outgoing_email_account
email_account.password = email_account.get_password()
File “/home/erp/erp/apps/frappe/frappe/model/base_document.py”, line 597, in get_password
return get_decrypted_password(self.doctype, self.name, fieldname, raise_exception=raise_exception)
File “/home/erp/erp/apps/frappe/frappe/utils/password.py”, line 16, in get_decrypted_password
return decrypt(auth[0][0])
File “/home/erp/erp/apps/frappe/frappe/utils/password.py”, line 101, in decrypt
plain_text = cstr(cipher_suite.decrypt(encode(pwd)))
File “/home/erp/erp/env/lib/python2.7/site-packages/cryptography/fernet.py”, line 75, in decrypt
return self._decrypt_data(data, timestamp, ttl)
File “/home/erp/erp/env/lib/python2.7/site-packages/cryptography/fernet.py”, line 119, in _decrypt_data
self._verify_signature(data)
File “/home/erp/erp/env/lib/python2.7/site-packages/cryptography/fernet.py”, line 108, in _verify_signature
raise InvalidToken
InvalidToken
please help me

seems that you have an error in Email Account doctype, you may entered the wrong password!
try to disable Outgoing email

@OmarJaber, thanks