In a TYPO3 (TYPO3 9) installation at our agency, we encountered problems with image processing using ImageMagick. ImageMagick was installed via the software manager, and Ghostscript was installed as well. Nevertheless, in the backend, when checking Image Processing under "Environment->Image Processing", we received the message "Image generation failedImage generation failedImageMagick / GraphicsMagick handling is enabled, but the execute command returned an error. Please check your settings, especially ['GFX']['processor_path'] and ['GFX']['processor_path_lzw'] and ensure Ghostscript is installed on your server."
What helped here was searching the "usr" directory for "convert". We found it in the directory "/usr/local/bin/", and exactly this directory needs to be entered under "Settings->Configure Installation-Wide options->Image Processing" in [GFX][processor_path] and [GFX][processor_path_lzw] ; by default, "/usr/bin/" is entered here. As soon as the new path is entered, everything works perfectly.
Seen at our internet agency on a website with TYPO3 9.5.20.
