AtoM PDF thumbnail not working

After migrating AtoM to a new server, PDF thumbnails stopped generating when uploading PDF files.

You can regenerate thumbnail for a resource with the command

https://www.accesstomemory.org/en/docs/2.7/admin-manual/maintenance/cli-tools/#regenerating-derivatives

When I run, I get error

The error “convert: command not found” is due to ImageMagick not installed on the server, fixed by installing ImageMagick with the command

Next, I get the error

Fixed by installing poppler-utils

PDF thumbnail got regenerated after installing the packages ImageMagick and poppler-utils.

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