The Signatures Problem was Solved. If anyone needs this [Thanx to user: bakin1999]:
To fix the error of not being able to upload images as signature, getting the “Image uploads are not available”. You must turn that on as a system configuration override.
https://docs.expressionengine.com/latest/general/system-configuration-overrides.html#sig_allow_img_upload talks about it in more detail here.
So adding, $config[‘sig_allow_img_upload’] = ‘y’; should allow images to be set. There are also all sorts of settings that can be set regarding how large these images can be.
The Problem with Edit profile empty fields…..Remains.