CustomfieldOptions Reporting

[EPSSystems DCDD]

I'm trying to write a report in PowerBI against issues with 'x' custom field against it and it is throwing me errors. The custom field is from a drop down list, hence can be found in the CustomFieldOptions table. The tables are mapped as follows :

Issue - Customfieldvalues - Customfields - customfieldoptions

Any assistance here would be appreciated.