In following week (starting 8. 3. 2021), login to affiliate program both from login page and widget will be removed. Affiliate login will be still available form
http://www.YOURDOMAIN.cz/affiliate-login/. Main changes will be in login widget on 3G templates. Whole tab section is removed leaving only user login remained. See widget on Classic template:
<div id="customerLogin"> login fields wrapper will stay preserved.