PHP warnings in debug.log while using Stackable 3.4.5

[andeng1106]

Describe the bug Issue from community:

Hi! I wanted to let you know that I'm seeing the following PHP warnings in my debug.log while using the current Stackable version...

[06-Sep-2022 19:16:09 UTC] PHP Notice: Undefined index: manager in /my-path/wp-content/plugins/stackable-ultimate-gutenberg-blocks-premium/pro__premium_only/src/custom-fields.php on line 121

and

[06-Sep-2022 19:16:09 UTC] PHP Warning: in_array() expects parameter 2 to be array, null given in /my-path/ wp-content/plugins/stackable-ultimate-gutenberg-blocks-premium/pro__premium_only/src/custom-fields.php on line 125

Errors found: PHP Notice: Undefined index: manager in /my-path/wp-content/plugins/stackable-ultimate-gutenberg-blocks-premium/pro__premium_only/src/custom-fields.php on line 121

PHP Warning: in_array() expects parameter 2 to be array, null given in /my-path/ wp-content/plugins/stackable-ultimate-gutenberg-blocks-premium/pro__premium_only/src/custom-fields.php on line 125

Screenshots