How it works? Extended activities and UiRobot

I have downloaded Uipath community eddition and having this question. I would really appreciate if somebody can help me understand.

I used some expandable activites to created a project file. Then for some reasons, I had to reinstall UiStudio and I tried to run the project file with it. But because I didn’t download activites which are used in the project file, it showed an error.
If I use UiRobot, will it runs programs okay without such kind of error no matter what extended activites are used in the program? or UiRobot also need to have same activities as the UiStudio does?

Please help!!!

Can you post the screen shots of error that you have encountered ?

Thank you for checking.
Here is the error message.

Hi @test_dfk
Can you share the source ? if possible