Fatal error: Cannot redeclare register_block_pattern() (previously declared in E:\WebSites\arnika.biz\httpdocs\wp-includes\class-wp-block-patterns-registry.php:291) in E:\WebSites\arnika.biz\httpdocs\wp-includes\block-patterns.php on line 21

Fatal error: Uncaught Error: Call to a member function set() on null in E:\WebSites\arnika.biz\httpdocs\wp-includes\l10n.php:857 Stack trace: #0 E:\WebSites\arnika.biz\httpdocs\wp-includes\l10n.php(960): load_textdomain() #1 E:\WebSites\arnika.biz\httpdocs\wp-includes\class-wp-fatal-error-handler.php(49): load_default_textdomain() #2 [internal function]: WP_Fatal_Error_Handler->handle() #3 {main} thrown in E:\WebSites\arnika.biz\httpdocs\wp-includes\l10n.php on line 857