There can be various reasons your loading screen doesn't work.
In this post, we will be listing the most common mistakes, when installing the loading screen
Mistake 1: Typos
Mistake 2: Wrong LoadingURL
- Make sure the file name 'autoexec.cfg' is correct.
- Make sure you typed sv_loadingurl "" correctly (Don't forget the space and that all has to be lower case).
Mistake 3: Other
- Make sure you copied the correct LoadingURL, the one from the Dashboard (Not the Browser-Demo).
- Did you save and upload the file to your server?
- Did you restart the server after uploading/saving?