Can't make any changes to the app I prototyped

I have been using AI Studio Build to prototype a few applications. Love it until it broke. I can no longer make any changes to the app (not deployed yet) even if it was a very small one. The conversation in the chat went very well as my instructions were all well understood and the summary of the changes looked great. Yet nothing was reflected in the preview. Got stuck here. Would like to hear your solution if you’ve experienced this before.