www.wysiwygwebbuilder.com

I'm working on a site which is almost finished. When I bring it up the Microsoft Edge browser and go to Developer Tools (F12), it shows numerous issues (warning and error messages):



In Google Chrome it shows no issues.

Is this potentially a problem?

This may be helpful:
https://www.wysiwygwebbuilder.com/seo_assistant.html

OK that cleaned up several items.

I guess this error only affects these browsers:

'img[loading]' is not supported by Firefox for Android, Safari, Safari on iOS.

I had Lazy Loading set for 2 photo galleries.

If the browser does not support this, then it will not affect the page anyway.