Solved
How to make Test Complete understand that it needs to work on a browser within a browser?
Please help me to understand why test complete is not able to insert values in the window that is in last screenshot.
Okay, then run your test to where it stops at the third screen. Then, use the Record feature and click back on the first browser manually. TestComplete will record the step you need to get back. Add that to your test.
Worked Added screenshot of the recording.
