Why am I getting the following when I'm trying to eliminate text colors

Operating system macOS Big Sur 11.4 both is safari and Chrome
when I try to eliminate color text from the home page, even as simple as a color change from yellow to black I get the following error:
Make any changes to your website using this administration area. Be sure to click the "Save" button at the bottom of the window to save all changes.

Select a Module:
Website Settings
You have errors in your form below. Please scroll down and correct the following:
Administrator Info Tab - You cannot enter in a toastmastersclubs.org/toastmastersdistricts.org address or one using your custom domain name.

Your admin email is invalid.
It cannot end in @toastmastersclubs.org

Thanks, I found the address wrong. I've been the admin for years and something changed my address. Both in membership and admin. It's corrected now. Thanks