When I download the indicator to FT4, The download did not successful, And show me this message.

I have the last update, My version number: 4.2.0.51 (2020.02.19).
I'm successfully downloading any other indicator, I only have a problem with this indicator ?
I deleted the FT4 and reinstalled it, but the problem hasn't been solved.
What is the solution to the problem please ?