Problem/Motivation
Deprecated function: strpos(): Passing null to parameter #1 ($haystack) of type string is deprecated in Drupal\path_alias\PathProcessor\AliasPathProcessor->processOutbound() (line 54 of core/modules/path_alias/src/PathProcessor/AliasPathProcessor.php).
Deprecated function: strpos(): Passing null to parameter #1 ($haystack) of type string is deprecated in Drupal\Core\Routing\UrlGenerator->generateFromRoute() (line 301 of core/lib/Drupal/Core/Routing/UrlGenerator.php).
Deprecated function: rawurlencode(): Passing null to parameter #1 ($string) of type string is deprecated in Drupal\Core\Routing\UrlGenerator->generateFromRoute() (line 306 of core/lib/Drupal/Core/Routing/UrlGenerator.php).