League joining issue(Unknown error)

Yesterday, I tried to change leagues several times. After that, suddenly I can no longer enter any league. It keeps showing a “Network Error” message again and again. However, my internet connection is fine, and everything else is working properly. But whenever I try to join a league, it shows an “Unknown Error” along with a network problem message.

The details are given belowSORRY

UNKNOWN ERROR[10000]

Sorry, something unexpected went wrong. Please make sure you have a reliable network connection and try again.

[qAOaTtWAOUCrCOvagZLiKQlx2B2XysSSiOCtfNxYq8nYw]

(UserId = 812378100217503744)

OK.