Unhandled exception: [validation crashed the program]

[Rmansourirad]

• Description: [Finally got the saving problem to work, but now it crashed when i clicked validate]
• Version: 0.2.3
• OS: Darwin-20.3.0-x86_64-i386-64bit
• Type: <class 'TypeError'>
• Value: 'NoneType' object is not subscriptable
• Traceback:

  File "creator/mainwindow.py", line 348, in validate
  File "creator/data/__init__.py", line 40, in validate
  File "creator/data/container.py", line 49, in validate
  File "creator/utils/validate.py", line 45, in validate_package_name