Module upgrade error in PS 1.7.6.4 (500 Internal Server Error)

[GKL]

Hello everyone!

I'm having an issue with upgrading existing modules in Prestashop.
Every time I click an Upgrade button in the Modules list, it gives me this:

"Error!

Could not perform action update for module undefined"

 

Or sometimes:

"Error!

Exception thrown by module ps_googleanalytics on upgrade. Error sent by Addons. You may be not allowed to download this module."

Uploading the latest version manually sometimes works, but mostly it doesn't.
No trace of the issue in the error log file.
Any ideas?

Best regards,
Lorincz

Edited September 21, 2020 by GKL (see edit history)

[GKL]

Checked the console and got an XHR with a "500 Internal Server Error" each time i click on a module's Upgrade button.

Any ideas?

 

Thanks,
Lorincz