Meta Box

Same error for me too :

[27-Dec-2022 17:42:28 UTC] PHP Warning: array_merge() expects at least 1 parameter, 0 given in /var/www/restricted/ssh/iomapr/www/wp-content/plugins/mb-core/vendor/meta-box/meta-box-template/src/Parser.php on line 38
[27-Dec-2022 17:42:28 UTC] PHP Warning: array_merge(): Argument #2 is not an array in /var/www/restricted/ssh/iomapr/www/wp-content/plugins/mb-core/vendor/meta-box/meta-box-template/src/Parser.php on line 39
[27-Dec-2022 17:42:28 UTC] PHP Warning: array_map(): Argument #2 should be an array in /var/www/restricted/ssh/iomapr/www/wp-content/plugins/mb-core/vendor/meta-box/meta-box-template/src/Parser.php on line 42
[27-Dec-2022 17:42:28 UTC] PHP Warning: call_user_func_array() expects parameter 2 to be array, null given in /var/www/restricted/ssh/iomapr/www/wp-content/plugins/mb-core/vendor/meta-box/meta-box-template/src/Parser.php on line 43
[27-Dec-2022 17:42:28 UTC] PHP Fatal error: Uncaught TypeError: Return value of MBTemplate\Parser::parse_files() must be of the type array, null returned in /var/www/restricted/ssh/iomapr/www/wp-content/plugins/mb-core/vendor/meta-box/meta-box-template/src/Parser.php:45
Stack trace:
#0 /var/www/restricted/ssh/iomapr/www/wp-content/plugins/mb-core/vendor/meta-box/meta-box-template/src/Parser.php(11): MBTemplate\Parser->parse_files()
#1 /var/www/restricted/ssh/iomapr/www/wp-content/plugins/mb-core/vendor/meta-box/meta-box-template/src/Register.php(45): MBTemplate\Parser->parse()
#2 /var/www/restricted/ssh/iomapr/www/wp-content/plugins/mb-core/vendor/meta-box/meta-box-template/src/Register.php(17): MBTemplate\Register->parse()
#3 /var/www/restricted/ssh/iomapr/www/wp-includes/class-wp-hook.php(308): MBTemplate\Register->register_meta_boxes(Array)
#4 /var/www/restricted/ssh/iomapr/www/wp-includes/plugin.php(205): WP_Hook->apply_filters(Array, Array)
#5 /var/www/restricted/ssh/iomapr/www/wp-content/plugins/meta-box/inc/core.php(25): apply_filters('rwmb_meta in /var/www/restricted/ssh/iomapr/www/wp-content/plugins/mb-core/vendor/meta-box/meta-box-template/src/Parser.php on line 45