Hey there.
You can ignore this for now. See this thread:
As for the other message: issues report will be imported for each module (project) in your solution, as well as for the project overall. So when I (succesfully) get an issue imported into SonarCloud, I see both:
INFO: Sensor Import external issues report
INFO: Imported 1 issue in 1 file
...
INFO: Imported 0 issues in 0 files
INFO: External issues ignored for 1 unknown files, including: Program.cs
Which I agree is a bit confusing.
Do you see multiple instances of the external issue report import in your logs? Is the issue you’re trying to import… imported?