Allgemein
Nextcloud does not create PDF previews
Source: https://stackoverflow.com/questions/37599727/php-imagickexception-not-authorized nano /etc/ImageMagick-6/policy.xml Change line: <policy domain=“coder“ rights=“none“ pattern=“MVG“ /> to <!– <policy domain=“coder“ rights=“none“ pattern=“MVG“ /> –> Change line: <policy domain=“coder“ rights=“none“ pattern=“PDF“ /> to: <policy domain=“coder“ rights=“read|write“ pattern=“PDF“ /> Restart php fpm: service php7.3-fpm restart (maybe restart nginx?)