Hi Gabriel,
I seem to have the exact same issue. I have installed the private uri 4.0.0 but it is not working. I also can not use the repair buton:
I have just reinstalled Uipath with no luck solving this case. I don’t seem to be able to use the Uiautomation activities pack, although I have installed it.
Please see also my question here for more details: Missing activities - UIautomation installed
Thank you for your assistance.