Error: Access request failed due to an unknown error

I'm having trouble getting administrator-level access. Every time I request access, I encounter this error: "Error: Access request failed due to an unknown error." On the side of the person granting access, everything appears normal, and it seems like access has been granted. However, in reality, I only have view-only mode. We've attempted removing and re-adding the user, and even experimented with providing access to different email accounts, but the problem persists - only view-only mode. How can I resolve this error, and where should I seek assistance for this issue?

I encountered this error and couldn't find a solution. Not sure if it's the same for you, but then I checked my messages and realized I just needed to accept access as an admin. The error was showing up because the request had already been made.