Hello,
Make sure that your max upload size limit is greater than the theme archive that you are trying to upload. Because seems it’s not enough. Here you can find all the server requirements – https://xstore.helpscoutdocs.com/article/60-xstore-theme-requirements Once limits will be increased follow our docs and video – https://xstore.helpscoutdocs.com/article/12-theme-installation https://youtu.be/UAlAkvoilfk
Regards
