You must set the policy of ImageMagick to allow PDF read. See https://stackoverflow.com/questions/52703123/override-default-imagemagick-policy-xml
ImagickException: unable to write blob '/tmp/magick-QJzTmFRdWj85IWVmwTD4qFoLwzeLy9yW': Disk quota exceeded @ error/blob.c/BlobToFile/406 in /home/zeidacadmey/public_html/e/mod/securepdf/view.php:98
Stack trace:
#0 /home/zeidacadmey/public_html/e/mod/securepdf/view.php(98): Imagick->readImageBlob()
#1 {main}