Uncaught ImagickException: attempt to perform an operation not allowed by the security policy `PDF'
Issue:
When attempting to view a PDF thumbnail, it fails with the error below in the logs:
Uncaught ImagickException: attempt to perform an operation not allowed by the security policy `PDF'
Fix:
Edit:
nano /etc/ImageMagick-6/policy.xml
Find:
<policy domain="coder" rights="none" pattern="PDF" />
Remove or comment out that line:
<!--<policy domain="coder" rights="none" pattern="PDF" />-->
Restart PHP FPM & Nginx/Apache.