I found when you do a member search and elect email as a action then Send list to me via Email
I get
Fatal error: Uncaught ArgumentCountError: Too few arguments to function mailer::set_subject(), 1 passed in /home4/acusersf/public_html/ub/admin/doexportemails.php on line 92 and exactly 2 expected in /home4/acusersf/public_html/ub/libs/mailer.inc.php:127 Stack trace: #0 /home4/acusersf/public_html/ub/admin/doexportemails.php(92): mailer->set_subject('DEE_SUBJECT') #1 {main} thrown in /home4/acusersf/public_html/ub/libs/mailer.inc.php on line 127
And it does not show up in the UBB cp server logs.
Show list in browser window with any format works.