SonarQube v5.6.6 Rest API - insufficient privileges - intellij-idea

Question

I'm trying to connect the SonarQube Community Plugin (from IntellIJ IDEA) to a local SonarQube instance, but looks like my users lack privileges to access the API. While trying to connect I get:
Cannot fetch SonarQube project and modules from SonarQube at mobilex.intra
org.sonarqube.ws.client.HttpException: Error 403 on https://qube.my.local/api/components/search?qualifiers=TRK : {"errors":[{"msg":"Insufficient privileges"}]}
at org.sonarqube.ws.client.BaseResponse.failIfNotSuccessful(BaseResponse.java:36)
at org.sonarqube.ws.client.BaseService.call(BaseService.java:55)
at org.sonarqube.ws.client.BaseService.call(BaseService.java:50)
at org.sonarqube.ws.client.component.ComponentsService.search(ComponentsService.java:58)
at org.intellij.sonar.sonarserver.SonarServer.getAllProjects(SonarServer.java:137)
at org.intellij.sonar.sonarserver.SonarServer.getAllProjectsAndModules(SonarServer.java:110)
at org.intellij.sonar.configuration.ResourcesSelectionConfigurable$DownloadResourcesRunnable.run(ResourcesSelectionConfigurable.java:120)
at com.intellij.openapi.progress.impl.CoreProgressManager$2.run(CoreProgressManager.java:247)
at com.intellij.openapi.progress.impl.CoreProgressManager$TaskRunnable.run(CoreProgressManager.java:750)
at com.intellij.openapi.progress.impl.CoreProgressManager$5.run(CoreProgressManager.java:434)
at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcess$1(CoreProgressManager.java:157)
at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:580)
at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:525)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:85)
at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:144)
at com.intellij.openapi.application.impl.ApplicationImpl.lambda$null$10(ApplicationImpl.java:565)
at com.intellij.openapi.application.impl.ApplicationImpl$1.run(ApplicationImpl.java:305)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Works fine while using an administrative account - but I don't want that. What privilege is needed to allow a common user to access the API and how do I apply it?