Unspecified error in Developer Console

Having added just a few lines of simple code to a new website that I’m working on, I noticed that, when previewed, it was reporting an error (unspecified) in the Developer Console window (see below)

There is no error in my code and it runs exactly as expected, so I think it may just be a coincidence that I noticed the error after entering my code.

I then started creating a new (test) site, using a Wix template which has no code. I switched on developer mode and hit Preview and it’s also reporting an error (as above). The error message repeats whenever a page is selected.

There is no explanation of the error and it doesn’t affect operation, but it surely can’t be right. Has anyone else encountered this or know how to resolve?

I am using MS Edge version 103.0.1264.37 (64-bit).