Also I have a active candidacy that Upwork withdrew months ago still showing and if I click on it I get the warning. Can’t archive this one.
While sometimes proposals stay active because the client hasn't yet closed the job (or it hasn't expired,) I see one proposal in your Active Proposals list should have been archived as the job has been cancelled. I chatted with our tech support about it and they are aware of an issue that may be causing it. We'll have a support ticket created for you to further investigate it and keep you updated.