Deprecated function: preg_quote(): Passing null to parameter #1 ($str) of type string is deprecated in domain_grant_all() (line 3429 of /modules/domain/domain.module). #1
Deprecated function: preg_quote(): Passing null to parameter #1 ($str) of type string is deprecated in domain_grant_all() (line 3429 of /app/docroot/modules/domain/domain.module).
This may be a PHP 8 issue, but it appears lots:
Deprecated function: preg_quote(): Passing null to parameter #1 ($str) of type string is deprecated in domain_grant_all() (line 3429 of /app/docroot/modules/domain/domain.module).