Fatal error: Uncaught Error: Call to undefined function ShortPixel\Model\wp_is_json_request() in /home/tutauki/websites/wp_2/wp-content/plugins/shortpixel-image-optimiser/class/Model/EnvironmentModel.php:231 Stack trace: #0 /home/tutauki/websites/wp_2/wp-content/plugins/shortpixel-image-optimiser/class/Model/EnvironmentModel.php(59): ShortPixel\Model\EnvironmentModel->setWordPress() #1 /home/tutauki/websites/wp_2/wp-content/plugins/shortpixel-image-optimiser/class/Model/EnvironmentModel.php(67): ShortPixel\Model\EnvironmentModel->__construct() #2 /home/tutauki/websites/wp_2/wp-content/plugins/shortpixel-image-optimiser/shortpixel-plugin.php(113): ShortPixel\Model\EnvironmentModel::getInstance() #3 /home/tutauki/websites/wp_2/wp-content/plugins/shortpixel-image-optimiser/class/external/formidable.php(15): ShortPixel\ShortPixelPlugin->env() #4 /home/tutauki/websites/wp_2/wp-content/plugins/shortpixel-image-optimiser/class/external/formidable.php(127): ShortPixel\Formidable->__construct() #5 /home/tutauki/websites/wp_2/wp-co in /home/tutauki/websites/wp_2/wp-content/plugins/shortpixel-image-optimiser/class/Model/EnvironmentModel.php on line 231