Your software
My Mautic version is: 4.01
My PHP version is: 7.4
My Database type and version is: MySQL 8+
Your problem
My problem is: Theme upload giving an missing file error when those file does exist.
These errors are showing in the log: Nothing is recorded in log
Steps I have tried to fix the problem: Duplicate file and recompressed … still same error … Images attached to thread tell it all
Error appear on browser when trying to upload theme compressed file
Theme file and folder structure