image_watermark not working

[ghost]

Error: spawn identify ENOENT
at Process.ChildProcess._handle.onexit (internal/child_process.js:269:19)
at onErrorNT (internal/child_process.js:467:16)
at processTicksAndRejections (internal/process/task_queues.js:82:21) {
errno: -4058,
code: 'ENOENT',
syscall: 'spawn identify',
path: 'identify',
spawnargs: [ '-verbose', 'D:\salary1.pdf' ]
}

[Tellarion]

apt-get install imagemagick