I wasn't able to reproduce these on our debug website (perhaps there is some problem with error displaying), but they show up on my Local with PHP 8.1.23 for two File Upload fields, one of them set up to multiple files.
Deprecated: strpos(): Passing null to parameter #1 ($haystack) of type string is deprecated in C:\Users\rafae\Local Sites\gravitykit\app\public\wp-content\plugins\gravityview\includes\extensions\lightbox\fancybox\class-gravityview-lightbox-provider-fancybox.php on line 163
Deprecated: nl2br(): Passing null to parameter #1 ($string) of type string is deprecated in C:\Users\rafae\Local Sites\gravitykit\app\public\wp-content\plugins\gravityforms\common.php on line 1092
Deprecated: strpos(): Passing null to parameter #1 ($haystack) of type string is deprecated in C:\Users\rafae\Local Sites\gravitykit\app\public\wp-content\plugins\gravityview\includes\extensions\lightbox\fancybox\class-gravityview-lightbox-provider-fancybox.php on line 163
I wasn't able to reproduce these on our debug website (perhaps there is some problem with error displaying), but they show up on my Local with PHP 8.1.23 for two File Upload fields, one of them set up to multiple files.