I assume you’re trying to save the Top 10 settings page?
It could potentially be some other plugin or mod security blocking the saving.
What is the exact error that you get? If it’s mod security, you might need to check with your host on this one.
Yes, When i make a change to the settings page and click “save” it refreshes to a 404 page error. This doesn’t happen to any other plugin i use
I noticed this issue many months back on my site and I traced it to apache’s mod_security blocking some post requests. I had my host look at this and they modified some rules which fixed this problem.
You might want to try disabling your other plugins and trying to see if one of them may be conflicting.