Candid UI stopped working for my canister at Mainnet

when i try Candid UI on my canister:

i get the error below, how to solve?
(command line still works)

An error happened in Candid canister:
Error: Principal “6nos7-piaaa-aaaan-qmbfa-c” does not have a valid checksum (original value “cate2-biaaa-aaaan-qmbfa-ca” may not be a valid Principal ID).
at a.fromText (
at 500 (
at webpack_require (

You need an i at the end.