I keep getting a warning on my admin screen that reads;
"Bad request for Imunify360 captcha server."
This happens on a custom install and a softalucous install.
Plus I cannot change the logo of favicon
Did you enable reCapture? If you did, check that you configure it properly.
reCaptcha and Imunify360 captcha is different things.
AbanteCart do not have "Imunify360 captcha"
Contact your hosting support and ask for support Imunify360 on your web server