This article describes ways the following error messages can be resolved.

As the first message says, it is often caused by a JS Optimizer Plugin.

If you have one of WP Rocket, AutoOptimize, Swift Performance or a similar plugin enabled please follow the following steps.

If this still doesn't solve the problem please contact our support.

WP Rocket

  • Deactivate "Combine JavaScript files"


  • Deactivate "Aggregate JS-files"

Swift Performance

  • Deactivate Merge Scripts

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