I can't start API Portal BTP Trial: sap.apimgmt.ui.settings.trialHome could not be loaded

Hi,

When starting the API Portal in BTP trial I get the error from the title. I activated the capability in the Integration Suite and used the booster to assign the roles. Later, I also manually added all the roles I could find related to API management.

Any idea of what is going wrong?

I see this policy security error in Chrome: