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:235 Stack trace: #0 /home/tutauki/websites/wp_2/wp-content/plugins/shortpixel-image-optimiser/class/Model/EnvironmentModel.php(61): ShortPixel\Model\EnvironmentModel->setWordPress() #1 /home/tutauki/websites/wp_2/wp-content/plugins/shortpixel-image-optimiser/class/Model/EnvironmentModel.php(69): ShortPixel\Model\EnvironmentModel->__construct() #2 /home/tutauki/websites/wp_2/wp-content/plugins/shortpixel-image-optimiser/shortpixel-plugin.php(122): 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-content/plugins/shortpixel-image-optimiser/build/shortpixel/PackageLoader.php(48): include_once('/home/tutauki/w...') #6 /home/tutauki/websites/wp_2/wp-content/plugins/shortpixel-image-optimiser/build/shortpixel/PackageLoader.php(40): ShortPixel\Build\PackageLoader->loadFiles(Array) #7 /home/tutauki/websites/wp_2/wp-content/plugins/shortpixel-image-optimiser/wp-shortpixel.php(110): ShortPixel\Build\PackageLoader->load('/home/tutauki/w...') #8 /home/tutauki/websites/wp_2/wp-settings.php(305): include_once('/home/tutauki/w...') #9 /home/tutauki/websites/wp_2/wp-config.php(33): require_once('/home/tutauki/w...') #10 /home/tutauki/websites/wp_2/wp-load.php(37): require_once('/home/tutauki/w...') #11 /home/tutauki/websites/wp_2/wp-blog-header.php(13): require_once('/home/tutauki/w...') #12 /home/tutauki/websites/wp_2/index.php(17): require('/home/tutauki/w...') #13 {main} thrown in /home/tutauki/websites/wp_2/wp-content/plugins/shortpixel-image-optimiser/class/Model/EnvironmentModel.php on line 235