Why is my Javascript console showing a 404 error for a file called "null" on a clean Wordpress install?

Every Wordpress site I am building shows 404 (Not Found) error in the Javascript console for a file called null. I have confirmed that this happening on a clean install of WP 5.9.3 without any plugins, settings changes, or database edits. Here's what it looks like in Chrome Dev console:

This happens on every page on the site whether I am logged in or not. In the above example, if you look at the referenced line 330, it's always a blank line at the end of the rendered HTML:

What is causing this error?

Topic 404-error Wordpress

Category Web

1
answered at

Turns out this was being caused by a Chrome browser extension. I use an extension installed called "CrxMouse Chrome Gestures." This extension is the cause of this error. I have turned off the extension and notified the author of this bug.

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