Conversation Agent INVALID_ARGUMENT

I’m trying to create my first Conversation Agent in Looker 25.20.19. For any question, I get the error:

SCHEMA_RESOLUTION: failed due to INVALID_ARGUMENT
“I am sorry, I cannot fulfill this request. The schema detection failed. Please try again later.”

Has anyone encountered this issue, and how can it be fixed?

Solved. Disabled IP Allowlist in Looker