Server compatibility check • PDF Pro v4.1
If you see "Data Directory NOT writable":
Run via SSH: chmod -R 755 data/ uploads/
Or in cPanel File Manager → Right-click folder → Permissions → 755
If "Root Directory NOT writable":
Run: chmod 755 . (in your project root)
If "PDO Extension NOT loaded":
cPanel → Select PHP Version → Check "pdo_mysql" and "pdo_sqlite"
If PHP version is too old:
cPanel → Select PHP Version → Choose 7.4 or higher
If still getting HTTP 500:
Check the error log above, or contact your hosting provider.