From the screenshot it seems that the ‘OK’ button element is being identified correctly. Its just the case that it is not being clicked when the process is run. Let me know if that’s not the case.
Try putting a Highlight activity right above the click activity that clicks on ‘OK’ button and see if the button actually highlights when it reaches that point. This way you can make sure that the selector is correct. If its not getting highlighted there itself that you may need to change the selector of the button. Please paste the selector here if possible.
If the selectors are proper then try changing the ‘WaitForReady’ property to ‘Complete’ for the Click button and See if it works.This way it will wait for the entire app to be loaded and then perform the click operation.
After few troubleshooting steps we resolved issue using,
1 - Highlight Element.
2 - Enter Key Code, Unchecked Simulate Type and Checked Sendwindowmessages.
Simulate type not working in our website for some reason (Tested again with Simulate Type, not working).