I've create a private Codeforces mashup and would like to disable manager mode and submit solutions to the ongoing mashup as a contestant. I'm trying to click this button: 
Instead of disabling manager mode as expected, Codeforces just refreshes the page, and I stay in manager mode. If it's helpful for debugging, here's a video of it happening.
If I'm using the tool incorrectly (or my account is in an invalid state or something), A) what am I doing wrong, and B) IMO, I think it would be helpful if CF displays an error message or something telling me what the problem is rather than just silently failing.
It works fine with me:
It's specific to some contests. For two of my mashups it works fine, but for the third it doesn't on both Chrome and Firefox on both mobile and desktop.
I'll have a look into it. Could you send me ids of contests?
Thanks!
Here's a mashup for which the button is broken: 376906.
And here are two mashups for which the button is working: 373736 and 368375.
@geranazavr555, any updates on this?
I figured out what's wrong, now in the process of fixing
Apologies for necroposting, but it seems that this issue persists for me too.
happening with me as well :(
The same thing is happening with me too. Previously for the same mashup, it was working. After extending the mashup duration, I tried to disable it, but now it's not working.
nvm i think they were talking abou tmashups
For now, unchecking manager from the Mashups page works for me.
Thank you, that works!