What does this error mean?

Question

I keep getting this error on my first query when using a Rovo agent I've built:

"Cannot invoke "com.fasterxml.jackson.databind.JsonNode.get(String)" because the return value of "com.fasterxml.jackson.databind.JsonNode.get(String)" is null"

The thing is, if I change the query to a different one, it seemed to be resolved, but the answer I get is for the first query, not the second one.

Dr Valeri Colon (Connect Centric) · Answer

@Gal.Shneor That error usually means the agent tried to read a field from your scenario or skill config that wasn’t present in the JSON the model returned. On the first query it hits the missing field and crashes; the next query reuses the cached state, so the answer looks mismatched. Check any Skills or response-format instructions referencing specific JSON fields and make sure they always exist.

Nikola Perisic · Answer

Hello @Gal.Shneor

Was the agent built with Forge or with no-code? If it was no-code, did you include skills for your agent?