How to disable all notifications of ShortPixel Image Optimizer

If you wish to disable all notifications and warnings generated by ShortPixel Image Optimizer (SPIO), you just need to follow the steps below.

WARNING: This procedure will disable absolutely all notifications and warnings. Even the important ones that inform you about a problem with your installation or about an important action you need to perform. Please proceed at your own risk.

Log in via FTP or use a file manager to edit your WordPress installation files.
Locate the wp-config.php file and open it.
Look for the That's all, stop editing! Happy publishing. line and add the following directly above it:

define('SHORTPIXEL_SILENT_MODE', 'true');

Save the file.

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