UBB.threads PHP Forum Software Community Forums UBB.threads Version 7/8 Support dashboard.php in version 8.0.0 giving "Uncaught TypeError"

Hello,

I'm getting the following error on admin/dashboard.php:

Fatal error: Uncaught TypeError: Cannot access offset of type string on string in /home/wsmith/html/board/admin/dashboard.php:177 Stack trace: #0 {main} thrown in /home/wsmith/html/board/admin/dashboard.php on line 177

Line 177 is:
$ubbt_admin['newmembers1'] = $newmembers1;

How can I fix this?

Thanks!