Fatal error: Uncaught Error: Call to undefined function gutenberg_block_template_part() in E:\P\Plugins\TemplateConvertorHost\htdocs\wordpress\wp-content\themes\blockbase\header.php:16 Stack trace: #0 E:\P\Plugins\TemplateConvertorHost\htdocs\wordpress\wp-includes\template.php(722): require_once() #1 E:\P\Plugins\TemplateConvertorHost\htdocs\wordpress\wp-includes\template.php(671): load_template('E:\\P\\Plugins\\Te...', true) #2 E:\P\Plugins\TemplateConvertorHost\htdocs\wordpress\wp-includes\general-template.php(41): locate_template(Array, true) #3 E:\P\Plugins\TemplateConvertorHost\htdocs\wordpress\wp-content\themes\blockbase\index.php(15): get_header() #4 E:\P\Plugins\TemplateConvertorHost\htdocs\wordpress\wp-includes\template-loader.php(98): include('E:\\P\\Plugins\\Te...') #5 E:\P\Plugins\TemplateConvertorHost\htdocs\wordpress\wp-blog-header.php(20): require_once('E:\\P\\Plugins\\Te...') #6 E:\P\Plugins\TemplateConvertorHost\htdocs\wordpress\index.php(17): require('E:\\P\\Plugins\\Te...') #7 {main} thrown in E:\P\Plugins\TemplateConvertorHost\htdocs\wordpress\wp-content\themes\blockbase\header.php on line 16