Hello, welcome to the community!
First of all, are you trying to use connected mode with SonarCloud 
or with a SonarQube 
server?
- If you are connecting to SonarCloud, you don’t need to provide a
serverUrland the organization key is visible on your organization’s page on SonarCloud, e.g the key for the SonarSource organization issonarsource:
-
If instead you are trying to connect to a SonarQube server, then you need to provide a
serverUrl, which is the root URL for your server - e.g,https://my-sq-server.my-company.tld- and you can ignore theorganizationKeyparameter. -
In both cases, the security token should be generated from your user profile on the server, e.g for SonarCloud:
- In any case and as described in the FAQ, you can refer to the SonarLint Output window for error messages.