Hi Reinhard,
Sorry for the trouble getting HelpBot up and running. The most common solution I have seen when running into saving errors with Teams app setup and permissions policies is waiting 24-48 hours. I’m unsure if it’s a data center or configuration issue in the Teams app catalog that causes this error, but in each case it was resolved by waiting a day before trying again.
Sorry again for the trouble and please let me know if waiting helps or if you have any other questions.
