I am attempting to connect Mautic to Thrive Leads plugin in Wordpress through their API. It has a Mautic integration.
OAuth1 is not connecting at all, and I have read that there is a known issue with OAuth1 at present.
OAuth2 is returning a "500 Internal Server Error" .
The WP installation, as well as Mautic is on a VPS and both installations are https.
Any thoughts of what I might be missing?