First doublecheck you have the latest version 5.17.0.4 of RTT installed ( or download 5.17.0.4 or higher from https://ilexius.de/apr )

Please select “Topix” manually
Than your user
Next requests should run through as used to

<aside> ⚠️
On a terminalserver solution ALL instances of RTT need to be closed before issuing the update setup
</aside>