Hey Jonny125!
A bit of a bump / a few questions for you about what kind of environment you’re running your WP install on. Is this a local ‘test dev’ environment you’re getting these errors on or on a Virtual Server or Shared Hosting service?
I’m getting this error and it was being triggered by a Chrome extension that was accessing jQuery. I switched the window to incognito mode & going to the same URL (without any extensions running) and the console error log disappeared.
Let me know what you find!