Anyone here knows how to properly link a problem from the public CF archive to a blogpost in my private group?

When I do something like this: [problem:1850A], the produced link is invalid. Namely, the produced link is

https://mirror.codeforces.com/group/aZzsRQnmmP/contest/1850/problem/A

instead of

https://mirror.codeforces.com/problemset/problem/1850/A

Or should I just use a hyperlink to the problem in private blogs?