can not identify prompt by using Object Spy

TC needs to be 'run as administrator' to properly access objects for identification.  The access level of the current user can be different.  You may need to check with your IT department to enable this.  If you are logging into the test computer as different users with different access levels this could be causing the problem.

https://support.smartbear.com/testcomplete/docs/general-info/configuring/testing-under-admin-account.html?sbsearch=Run%20as%20administrator

TestComplete will run a web browser with the same privilege level it is assigned.  To launch a browser as a different user you could script a call to start your browser.  As you have found, testing with different privilege levels can be problematic and even unstable at times.   I hope this helps!  

WshShell = Sys.OleObject("WScript.Shell");
WshShell.Run("runas /user:StandardUser \"C:\\Program Files (x86)\\Microsoft\\Edge\\Application\\msedge.exe\"");
// Or...
WshShell.Run("runas /user:StandardUser \"C:\\Program Files (x86)\\Microsoft\\Edge\\Application\\msedge.exe https://your-web-app.com\"");