[Solved] Printful Sync Error – HTTP Error 414 Request-URI Too Long

Problem: Printful.com shop is displaying the following syncing error message:

Something went wrong with sync. Received error: HTTP Error 414 Request-URI Too Long. Try to refresh data.

Solution: Adjusted a setting in the WordPress iThemes Security plugin:

WordPress admin > Security > Settings > System Tweaks > un-tick the “Filter Long URL Strings” setting

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