TN3270 field not valid

[marianolopezcortes]

Hello

I'm using a TK4 TN3270 environment docker image skunklabz/tk4-hercules:latest with user HERC04 password PASS4U.

After logon, I can't select an option in the main menu. I have an error:
INVALID OPTION

With w3270 and others clients works ok. But I have this error on recording with JMeter. I don't understand what is the problem.

Could you help me please?

I send you an wireshark export.
export.json