Updating to WordPress 6.4: Undefined array key

On trying to install the new WordPress update I’m getting the following errors:

Those warnings wouldn’t crash the update (PHP Warning). We’ll get them addressed, but check for Fatal in that log. Also check your wp-config for clues. Update went fine for my sites so far.

Found some recent fatal errors but none from today:

[05-Nov-2023 07:00:19 UTC] PHP Fatal error: Uncaught Error: Attempt to assign property "test_mode" on array in /home/snowwatc/public_html/wp-content/plugins/formidable/stripe/models/FrmStrpLiteSettings.php:58

[06-Nov-2023 18:40:03 UTC] PHP Fatal error: Uncaught Error: Failed opening required '/home/snowwatc/public_html/wp-content/themes/pro/framework/classes/Theme.php' (include_path='.:/opt/alt/php81/usr/share/pear:/opt/alt/php81/usr/share/php:/usr/share/pear:/usr/share/php') in /home/snowwatc/public_html/wp-content/themes/pro/functions.php:23

[06-Nov-2023 18:42:03 UTC] PHP Fatal error: Uncaught Error: Failed opening required '/home/snowwatc/public_html/wp-content/themes/pro/framework/classes/Theme.php' (include_path='.:/opt/alt/php81/usr/share/pear:/opt/alt/php81/usr/share/php:/usr/share/pear:/usr/share/php') in /home/snowwatc/public_html/wp-content/themes/pro/functions.php:23

wp-config.php looks fine.

I would reinstall Pro and Formidable and see if that helps.

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