Is canisters management broken on nns.ic0.app?

Hey @CodingFu, thank you for reaching out! We noticed this issue yesterday and are working on a fix. We plan to submit the NNS proposal on Friday. If it is adopted, and everything goes well, the fix will take effect some time next Monday (14/10/2024).

Do you have any other controllers on your canister? In which case, you can use dfx in the meantime to add or remove controllers.