Hi @marnall, Thank you for your comment, I will definitely try that next time. At this time, I was able to workaround the issue and upload the app by extracting the add-on tar and performing the following:  1-Navigate to the add-on default directory. 2- vi addon_builder.conf,  3- change this line accordingly: builder_version = 4.1.3 4- Run: find . -name .DS_Store -delete (macOS)  5- tar the app folder again and re-upload.  It would be beneficial for the vendor to update the add-on to ensure it meets the criteria for official support.    ... View more