Thumbnails are not generating after upgrading to Omekas 4.0

Hello everyone,
I have upgraded to Omekas 4.0. Now the Derivative Image module is showing the error “invalid config/module.ini file” and thumbnails are not generating while adding new items with media upload. Is there any configuration that needs to be done for Omekas 4.0?

The Original file is uploaded bu the thumbnails are not generating.

this may be the issue? ImageMagick [Unable to execute command]

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