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 has the same above problem in that group.

• 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? Thanks.