Hello! Yes, it’s on a multisite, with the plugin running site by site rather than as a network activation. Basically we have a template site that we set up for each new course and then copy for each student. There is a page for them to upload supporting documentation on which we have WTF running with the following shortcodes:
[wtf_fu_upload]
[wtf_fu_show_files]
This allows the students to upload their documentation and for moderators to see it in the page.
The plugin seems to work fine until you try to upload a file. You choose the file, hit the Start Upload button and the progress bar goes up as if the upload is happening. Instead, a red ERROR indicator shows underneath the file in the uploader with the error SyntaxError: Unexpected token <.
I’ve checked permissions on the folders, checked the other plugins and the theme but I still get the error which suggests a problem with 4.3 itself (or at least this particular installation).