This is strange as we tested it again and both custom CSS and editing settings works fine for us in the Google Chrome browser.
Can you please try to login in the website from the incognito window? As at the moment it is working fine for us it looks like the browser related issue.
Ok, then we need to know one more thing to test it.
Did you migrated to Redux framework settings? You can see the status when opening “Admin sidebar > Jevelin > Framework Upgrade”