Tests failing with 'Cannot Find existing or open blank page error' part way through a test run

[Sabiha]

I have a  suite of tests that have been running successfully on a Chrome browser, but recently started failing part way through a test run.

The tests start off fine and then fail to find the web page. The error I am seeing is:

As far as I can tell the SmartBear extension is installed and is compatible with the version of TestComplete that I am using.

I am using TestComplete v15.20 Bld 341

Has anyone encountered this before or can help diagnose what's happening.  It's bizarre that the tests should start failing in this way part way through a test run. 

[Marsha_R]

Are you in Chrome or in Edge?

[Sabiha]

Using Chrome for these particular tests. 

[Marsha_R]

I see in the error you posted that Edge is mentioned as the browser. Perhaps this is the issue somewhere in your code?