Not sure what happened during the upgrade, but both work now. Thanks for your help.
Two more questions.
1. Even after implementing captcha and user approval process there's no guarantee that the new user is not a spammer. Is there an option to require a user's first post to be approved? I was able to find settings where all posts have to be approved or none.
2. I did "Backup Tables" under "Database Tools". Before that did "(Test Directory)" and the absolute path is writable.
The backup took several minutes and ended with this message:
Backing up table data for ubbt_polltemp...
Complete at 2025-12-21 06:19:06
But the backup directory has no backup file(s).
PS: It would be nice if the configuration options were searchable. There are so many options spread over so many screens.