Ahh got it. I had to reset all file permissions on the whole site back to "defaults" (whatever that was) via the NS management center. Apparently my manual adjustments I made either didn’t work or I had missed something. Also changing the settings inside the ModX manager must not have hit all relevant files.
Anyway, it’s working now. Thanks very much for your help.
Thanks OP, I was having this issue too. Your solution worked.