Logon to FME Server v25.2.1 with AD credentials. Once there, not authorized message despite authorization to workbenches.

I am logging in  FME FLOW on our local FME Server (v25.2.1) using my AD Credentials that I manually enter.  When I get logged in, I try to open several workbenches that I had previously uploaded and to which I had full access. However, I get a popup message “Unauthorized request by user (myaccountname) due to lack of proper permissions or the object does not exist.”

I contacted the local FME administrator who advised that my account had full permissions to the workbenches I was trying to access.  He advised I log off and back in several times, the implication that he was reviewing or changing something on his end.  And always the same resulting error message.

The administrator is adamant that I should be able to access the workbenches, however, I cannot.
I had asked that the issue be escalated but the administrator was unsure where to escalate the issue.
I am looking for any advice on the issue.
Thanks in advance