sonar.coverage.jacoco.xmlReportPaths is not defined after upgrading SonarQube

Hey there.

What version did you upgrade from? There was a change related to JaCoCo report formats that was noted in the upgrade notes:

Support for .exec format JaCoCo Coverage Reports dropped (8.2)
The .exec format for JaCoCo coverage reports is no longer supported.

Once upgraded, you will only be able to import .xml style reports. You should ensure that you are now Importing JaCoCo coverage reports in XML format.