Please note the MOST IMPORTANT point from that guide below...
Clickbank communicates OFI (Order Form Impressions, aka Engagements) to third-parties like ClickMagick using old technology. One day you will wake up & find that technology no longer works anywhere. The entire online advertising industry is phasing out this old technology as we speak.
2. MAKE SURE YOUR ENCRYPTION IS SET TO "NO" IN CLICKBANK:
If your page builder has Pass On Parameters enabled for the affiliate links on your page, then this can interfere with tracking Engagements and/or Sales.
The Pass On Parameters setting passes unnecessary data, which can stomp on good data, and cause tracking to break.
Here is how to disable that setting in Convertri for example: