MySQLdb has no 'Error' member

[BLasan]

Describe the bug
MySQLdb module imported in DownloadManager.py and UserManager.py file gives an error call 'Module MySQLdb has no 'Error' member' in exception handelling.

To Reproduce
Steps to reproduce the behavior:

1. Go to 'components/core/DownloadManager.py' and 'components/core/UserManager.py'
2. Replace 'MySQLdb.Error' with 'MySQLdb._mysql.Error'

Expected behavior
There should not be any error called 'Module 'MySQLdb' has no 'Error' member'

Screenshots

Desktop (please complete the following information):

• OS: Ubuntu 18.04.4 LTS
• Browser: Chrome
• Version 80.0.3987.149

Additional context
For installations and running the web app this error will not affect.
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