Go back to the beginning. Take the config doc. Follow it exactly. Don’t add anything not in the doc and don’t omit anything.
It will work. You have missed something.
You can post your remote config file here, also send screenshots of the DVCC and ESS pages on the GX.
I Genuinely think i have followed that setup to the letter. It was working fine and now it isn’t (without me changing anything specifically on the settings that I know of)