Error message

• Deprecated function: strpos(): Passing null to parameter #1 ($haystack) of type string is deprecated in Drupal\path_alias\PathProcessor\AliasPathProcessor->processOutbound() (line 54 of core/modules/path_alias/src/PathProcessor/AliasPathProcessor.php).
• Deprecated function: explode(): Passing null to parameter #2 ($string) of type string is deprecated in Drupal\simple_sitemap\PathProcessor\PathProcessorSitemapVariantOut->processOutbound() (line 19 of modules/contrib/simple_sitemap/src/PathProcessor/PathProcessorSitemapVariantOut.php).
• Deprecated function: strpos(): Passing null to parameter #1 ($haystack) of type string is deprecated in Drupal\Core\Routing\UrlGenerator->generateFromRoute() (line 300 of core/lib/Drupal/Core/Routing/UrlGenerator.php).
• Deprecated function: rawurlencode(): Passing null to parameter #1 ($string) of type string is deprecated in Drupal\Core\Routing\UrlGenerator->generateFromRoute() (line 305 of core/lib/Drupal/Core/Routing/UrlGenerator.php).