Hi Khaja,
Can you please make sure the application is in the Trusted security zone in Microsoft IE and then try again?
If it didn't help, which is very likely to be the case, can you please run the script until the point it supposed to click on "Activate CA". Stop it. Disable standards enforcement from the Advanced menu of TruClient browser and then manually click on the "Activate CA" button (not through replay). Is there any difference in the behavior?
Please open support call in parallel to this post
Regards,
Shlomi