Mac Thunderbird won't sign in to Zoho mail

Mac Thunderbird won't sign in to Zoho mail

Hello.
I've spent all morning trying to make Thunderbird connect to the Zoho servers. I've checked and everything seems to be in working order. I can even log in web zoho mail with no problems. The Thunderbird app in my Mac cannot send the password or something. I'm attaching screencaps.
Any ideas?
Thank you so much.