Cannot find window with index: '1'

[kazurayam]

I do not know anything about your Application Under Test, so that I have no more idea.

If you want others to help, you should provide more information so that other people can reproduce your problem on their side. See the following guidance:

[TIP] How To Help Us Help You!

My test is BROKEN! NOTHING WORKS! HELP ME! Relax. We get it. We really do. There are some pretty smart and clever people on this forum, but you must realize, they are not magicians or wizards or gods. They cannot see your code, they can’t see your errors and they don’t even know what your AUT is meant to do even though it might seem perfectly obvious to you. So please relax and follow the advice below, before you start writing your post. The advice below will tell you the exact information …

At least I would require you to make the URL of your Application Under Test public so that I can see the page on my PC. If your AUT is private, then it would be very difficult for me to dig into your problem.