Fresh install ProcessWire 3.0.39 + multilangual support
In video it shows how it goes. And I can't figure it out. It happens for few of my sites.
td;tl : Upload 5 image in images field -> Save -> 2 left.
EDIT : Files are in "/assets/files/id"
For a little more info on what I found which will hopefully help others:
There were lots of JS errors in the browser developer tools Console tab like this:
Uncaught SyntaxError: Unexpected token <
which is a good indication that there is an error message, or at least some HTML being returned in the AJAX request which is not expected by the JS script.
So then I went to the Network tab of the developer tools and found the script that is uploading images (?id=1&InputfieldFi