Some users have reported intermittent issues with the Free Cloud service being down or taking forever.
This is most likely because of Google's bait-and-switch advertising for their Gemini 1.0 Free Tier, in which they first advertised a very high rate limit for developers, which was praised by the media, and a few days later quietly drastically reduced those limits without notifying anyone.
For now, I've switched Free Cloud to a more reliable service.