doleq

Hello.
I have the same problem.
I reset the CACHE, recreate the table and there is still a problem.

https://www.przewodygrzejne.info/przewodniki_projekto/raychem-wybor-systemu-do-ogrzewania-podjazdow/

Warning: json_decode() expects parameter 1 to be string, object given in /autoinstalator/wordpress7/wp-content/plugins/wpdatatables/source/class.wpdatatablerows.php on line 326

Fatal error: Uncaught TypeError: Argument 1 passed to WPDataTableRows::setColHeaders() must be of the type array, null given, called in /autoinstalator/wordpress7/wp-content/plugins/wpdatatables/source/class.wpdatatablerows.php on line 30 and defined in /autoinstalator/wordpress7/wp-content/plugins/wpdatatables/source/class.wpdatatablerows.php:92 Stack trace: #0 /autoinstalator/wordpress7/wp-content/plugins/wpdatatables/source/class.wpdatatablerows.php(30): WPDataTableRows->setColHeaders(NULL) #1 /autoinstalator/wordpress7/wp-content/plugins/wpdatatables/source/class.wpdatatablerows.php(334): WPDataTableRows->__construct(Object(stdClass)) #2 /autoinstalator/wordpress7/wp-content/plugins/wpdatatables/controllers/wdt_functions.php(524): WPDataTableRows::loadWpDataTableRows(’32’) #3 /autoinstalator/wordpress7/wp-includes/shortcodes.php(343): wdtWpDataTableShortcodeHandler(Array, ”, ‘wpdatatable’) #4 [internal function]: do_shortcode_tag(Array) #5 /autoinstalator/wordpress7/wp-includes/shortcodes.php(218): preg_replace_callb in /autoinstalator/wordpress7/wp-content/plugins/wpdatatables/source/class.wpdatatablerows.php on line 92