This error can have several causes:
The Access Connect Service on the server is not logged in with an account that has the required permissions. Use a Domain Administrator account.
Your database has not been synchronised with Workspace. Log in to Dimensions as the relevant user and run a sync. If you have multiple databases, sync all of them.
The email address for a Workspace administrator account has changed without Workspace being updated, meaning that person is no longer recognised as an administrator.
To fix cause 1, ask your IT team to configure the Access Connect Service to run under a domain administrator account with full permissions. To fix cause 2, sync all Dimensions databases with Workspace:
Click System, then click Data Utilities.
Click Synchronise Access Evo apps.
To fix cause 3, contact support. See Get support in Access Digital Tax.