Hi there,
I'm testing out your product linker addon for WHMCS. I've successfully installed the module, however, when visiting the addon page and attempting to create a configureable option on the relation management page, I don't have the option to select anything under the Product Addon/Configurable Option section. I can select a linked product, but that's it. See the attached screenshot. We're currently running WHMCS 5.2.16
Is there possibly something i'm missing here? Any help you can provide is appreciated.