This error is reported if you open a test project in Test Designer containing model types that do not conform with ARIS Method.
Error message
The project uses the user-defined model type <name of model type> that is not available for the connected tenant. Please import a filter containing the model type.
Further information is available on the When are method changes available? help page (Help > Help topics).
Cause
This model type is available in the test project, but not on the current tenant.
Solution
Import a method filter into the configuration of the current tenant.