No, the fact that link points to https://translatewiki.net/wiki/MediaWiki:Apierror-flaggedrevs-cantunreview/bn , which is empty at the moment, doesn't mean much. The link is created automatically.
The translator may have had an issue with translating the page and couldn't create it. Unfortunately, we cannot help the translator if we don't get a description of the problem, so it's more "Invalid" than declined.
I'll be happy to reopen this task and help the translator if a proper description is provided.