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Wordpress error uploading PDF: ImagickException: Unable to read image blob; PHP message: Upload failed: String binary is zero after processing image

Rangel Sardinha

Updated April 10, 2025 12:09

Plesk for Linux kb: technical

Applicable to:

Plesk for Linux

Symptoms

WordPress instance is having issues uploading PDF files:

PLESK_ERROR: AH01071: Got error 'PHP message: ImagickException: Unable to read image blob; PHP message: Upload failed: String binary is zero after processing image'
Plesk is using Debian/Ubuntu

Cause

The ghostscript package is missing.

Resolution

Connect to the Plesk server via SSH.
Execute command:
# apt-get install ghostscript

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