Hi, I created some mashup contests via polygon link about 2 weeks ago, everything is fine at that moment.

But in the past 2-3 days, especially while codeforces having a contest, my mashups seem to be failed (right now it's failed). It said "Can't read or parse problem description" when I enter a problem. At the dashboard page of the contest, I noticed this: .

But after few hours, everything turned back to normal.

For more details:

• mashup id is 274862

• I added it to a public group, contest link. Right now many problems in that mashup are not accessible (proof). Btw there are many mashups in that group has the same "Can't read or parse problem description" problem.

• Polygon link: https://polygon.codeforces.com/p8gcXPh/tuvietthao/voj-vosnseq

I have done:

• Create a package

• Give access to 'codeforces' account in polygon

(proof)

But seems like doesn't work.

Did I do anything wrong? Or this is a bug?

Thanks, sorry for my poor English.