Fatal error: Uncaught ImagickException: no decode delegate for this image format `' @ error/constitute.c/ReadImage/504 in /var/iiif/herb/image_proxy.php:191 Stack trace: #0 /var/iiif/herb/image_proxy.php(191): Imagick->__construct() #1 /var/iiif/herb/image_proxy.php(136): get_full_image() #2 /var/iiif/herb/image_proxy.php(32): return_thumbnail() #3 {main} thrown in /var/iiif/herb/image_proxy.php on line 191