Hi Armand,
I can recreate the same error in PAW 2.0.78 by uploading an invalid zip file, such as a zip file of JPEG. I am not saying that you have uploaded an invalid zip file.
An invalid file is just one way to create the error message. I have my error message in the attached file.
If you want to test whether the issue is related to the zip file or not, I recommend that you download the default theme call "System default", rename the zip file without modification, and then upload it to PAW.
If you still get an error message, I suspect that the issue is not related to the zip file.
I hope this testing helps you with your investigation. Good luck!
Best regards,
Kong
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Kong Intrasinghathong
Master Consultant
QueBIT Consulting
Analyze. Plan. Achieve.
https://quebit.com------------------------------