Membership Post-Sale Landing Page Issue

FYI - I received two reports this week from shooters who renewed their membership in Practiscore that after processing the payment, they get a landing page with random code language. The payments went through and the memberships renewed fine, just a landing page issue. Not urgent just a heads up. Thanks!

Can you directly email me specific info on both shooters?
Which club. Cactus Combat?
Who they are with their emails.
What day they did this?
I need as much specific info as possible before I go to the web master.