I'm using polygon to create problems for my private mash-up contest. Everything was fine yesterday. Today, I have the following problems:

• In polygon, when trying to access the problem (Continue button), I'm getting message "Can't open problem [my problem]. It is possible that conflicts were found. Try "Resolve conflicts" option", and the "Resolve conflicts" button opens a blank screen. I'm using only one account for the problem, so there must be no conflicts.

• In codeforces, I'm getting "Denial of judgement" verdict with message: "Can't compile file: Unable to find classes \[my file].class", where [my file] corresponds to my main correct solution.

The last change in polygon was 28 hours ago, and everything worked fine after that. Today, I wasn't able to open my problem in polygon. A few minutes ago, after I edited my mash up contest to set "Is practice allowed?" to "true", Denial of judgement started (I'm not sure the time is exactly the same, but I didn't do anything else with the contest since yesterday, and these events are at least within a few minutes).

If there is a quick fix for the second problem, I really need that now. Due to problems with polygon, I can't repackage the problem. Also, I can't even access the problem on polygon, so even if I wanted to create a copy, I can't.

If someone with access can take a look, these are:

• the problem on polygon: https://polygon.codeforces.com/edit-continue?workingCopyId=1110315&ccid=a13f6fe61a130c678f8b72151571c656
• the contest: https://mirror.codeforces.com/group/UUnRDaUINA/contest/477830/problem/A and the problem: https://mirror.codeforces.com/group/UUnRDaUINA/contest/477830/problem/A on codeforces