Fatal error: Uncaught Error: Call to undefined function add_filter() in C:\xampp\htdocs\stopcovid.anamai.moph.go.th\wp-content\plugins\codespacing-progress-map\admin\libs\metabox-field-select2\cmb-field-select2.php:30 Stack trace: #0 C:\xampp\htdocs\stopcovid.anamai.moph.go.th\wp-content\plugins\codespacing-progress-map\admin\libs\metabox-field-select2\cmb-field-select2.php(187): PW_CMB2_Field_Select2->__construct() #1 {main} thrown in C:\xampp\htdocs\stopcovid.anamai.moph.go.th\wp-content\plugins\codespacing-progress-map\admin\libs\metabox-field-select2\cmb-field-select2.php on line 30