It appears the OP fixed this on their own, or lost interest in fixing it.
Microsoft Access Error After April 2024 Microsoft Update: Too many client tasks
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I am getting the error "Too many client tasks" when querying an Access database using ODBC after an April 2024 Microsoft update was applied, which was the update for Office 2016 KB5002340.
When I uninstalled that update, it's working well again. Is Microsoft aware of this, and will the fix be available soon?
I saw the below thread, but this seems to be the opposite problem, i.e. it was working and the Microsoft update last month caused it to stop working: