Artidee, I have solved the issue by just using 7zip and uncompressing all the .gz files in the exported html 5 package. Afterwards, by removing all .gz references in the html file. There are exactly 5 of them. There is one where it says “xxxxx” : .gz; and you have to remove everything so its stays “xxxx;.” I don’t know the exact syntax, I am away from my computer. Afterwards you can just upload it to your FTP, rename the xxxx.html to index.html and load up the address in the browser.
This at least worked for me.