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
.execformat JaCoCo Coverage Reports dropped (8.2)
The.execformat for JaCoCo coverage reports is no longer supported.Once upgraded, you will only be able to import
.xmlstyle reports. You should ensure that you are now Importing JaCoCo coverage reports in XML format.