Hello,
Can you please check any on load client scripts on incident form where they might have used glide ajax and let me know ?
Usually this happens when there is a problem in glide ajax while calling any script include
in your case as you are getting error while opening the form it must be a on load client script
Please debug by deactivating such client scripts and then check if the error is coming up in portal. If the error is not there after deactivating the client script then we can debug which client script it is .
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