Welcome to the Roku Community.
Firstly, be aware that we only support English in the Roku Community. We had to use google translate to understand your inquiry.
We'd like to know more about the issue you are experiencing. To clarify, you only see a black screen when accessing the Paramount Plus on your Roku device. Is that correct? Does the issue only occur on this specific channel or all channels on your Roku device? Are you trying to access the content from Paramount Plus standalone or through The Roku Channel?
With more details, we will be able to assist you.