Deprecated warnings & cannot log in to WP Admin with debug on

Hi

My web host forced an upgrade to PHP 8.1.25.

Subsequently am getting deprecated warnings as per below ONLY if Woody is active. AND whilst debug is set to true it is also impossible to log into WP Admin whilst your plugin is active.

Deprecated: strpos(): Passing null to parameter #1 ($haystack) of type string is deprecated in .../wp-includes/functions.php on line 7241 Deprecated: str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in .../wp-includes/functions.php on line 2187 Deprecated: strpos(): Passing null to parameter #1 ($haystack) of type string is deprecated in .../wp-includes/functions.php on line 7241 Deprecated: str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in .../wp-includes/functions.php on line 2187 Deprecated: strpos(): Passing null to parameter #1 ($haystack) of type string is deprecated in .../wp-includes/functions.php on line 7241 Deprecated: str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in .../wp-includes/functions.php on line 2187 Deprecated: strpos(): Passing null to parameter #1 ($haystack) of type string is deprecated in .../wp-includes/functions.php on line 7241 Deprecated: str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in .../wp-includes/functions.php on line 2187 Deprecated: strpos(): Passing null to parameter #1 ($haystack) of type string is deprecated in .../wp-includes/functions.php on line 7241 Deprecated: str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in .../wp-includes/functions.php on line 2187 Deprecated: strpos(): Passing null to parameter #1 ($haystack) of type string is deprecated in .../wp-includes/functions.php on line 7241 Deprecated: str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in .../wp-includes/functions.php on line 2187 Deprecated: strpos(): Passing null to parameter #1 ($haystack) of type string is deprecated in .../wp-includes/functions.php on line 7241 Deprecated: str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in .../wp-includes/functions.php on line 2187 Warning: session_start(): Session cannot be started after headers have already been sent in .../wp-content/plugins/_lamna-gf-searchterms/lamna-gf-searchterms.php on line 47 Warning: Cannot modify header information - headers already sent by (output started at .../wp-includes/functions.php:7241) in .../wp-login.php on line 502 Warning: Cannot modify header information - headers already sent by (output started at .../wp-includes/functions.php:7241) in .../wp-login.php on line 518 Warning: Cannot modify header information - headers already sent by (output started at .../wp-includes/functions.php:7241) in .../wp-includes/functions.php on line 7049