Latest version of the plugin breaks the Service Providers tab under Settings.
Multiselect doesn't seem to load properly. Instead Services Provided table disables a running list of all services. Clicking the "Edit" button on a service provider leads to nothing.
I can replicate this every time. Using the latest version of Appointments+ (2.3.1) with WordPress 4.9.6 on PHP 7. I have already done conflict debugging and disabled all plugins and used the 2017 theme. Problem still persisted.