Issue uploading files I have completed a website for a school who can't upload files when in school.
When they upload a file the status bar loads the full way across the screen but at the top right it just keeps spinning. Nothing more happens - the files doesn't become available.
I can upload fine from home and the staff can upload fine at home as well.
What is the likely cause of this issue - I have log files to check if need be - I deleted the log files then asked them to try and upload a file - then I took a copy of the log files with Dev Mode on.

Is this likely to be a Firewall Issue in the school? I did a website for another local school who would have the same IT provider but have no issues there.
I'm glad you identified and resolved the issue!

I stumbled across this post because I had the same GUI response/result in Craft CMS and want to share how I resolved it for others that may have the same issue without being a firewall problem.

See my answer here