Weird Runtime Exception: Failing to Write to Cache

Hi there,

I have the following error in my site logs that doesn’t seem too familiar. It seems to be causing intermittent 500 errors. See below.

I also recently updated the Photo Gallery by Supsystic Plugin to 1.14.5:

[Mon Dec 02 17:03:06.404182 2019] [php7:error] [pid 26588] PHP Fatal error: Uncaught RuntimeException: Failed to write cache file "/wp-content/uploads/grid-gallery/cache/twig/f7/f1/c1165159e767a099cfbe3fc9eb3aaf04b36d4e31353759cd7c24fd4c4fad.php". in /wp-content/plugins/all-in-one-event-calendar/vendor/twig/Environment.php:1260\nStack trace:\n#0 /wp-content/plugins/all-in-one-event-calendar/vendor/twig/Environment.php(342): Twig_Environment->writeCacheFile('/nas/content/li...', '<?php\\n\\n/* @gall...')\n#1 /wp-content/plugins/all-in-one-event-calendar/vendor/twig/Environment.php(300): Twig_Environment->loadTemplate('@galleries/shor...')\n#2 /wp-content/plugins/gallery-by-supsystic/src/GridGallery/Galleries/Module.php(548): Twig_Environment->render('@galleries/shor...', Array)\n#3 /wp-content/plugins/gallery-by-supsystic/src/GridGallery/Galleries/Module.php(336): GridGallery_Galleries_Module->render('@galleries/shor...', Arra in /wp-content/plugins/all-in-one-event-calendar/vendor/twig/Environment.php on line 1260