This article applies to PRTG Network Monitor 19 or later
Unresponsive script in Map Designer
When you open the Map Designer in PRTG, the entire device tree is loaded to ensure you can easily use drag-and-drop with all of your monitoring objects.
Pre-loading your device tree might take a few seconds at first, with the benefit of faster operation later. However, in very large installations, your browser might show the warning displayed above, depending on your configuration, client, and browser. We have seen this in Firefox with installations that contain 5,000 sensors and more.
Confirm the alert with Continue to wait for it to finish. After successful startup, you can use the Map Designer as usual.
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