Hey there future readers! I have fixed this problem by using SiteGround Speed Optimizer Plugin by completely clearing everything cache related, then re-applying “Dynamic Cache” and “File Based Cache” but leaving “Memcache” OFF
Memcache seemed to be the issue giving me this “You are trying to access invalid donation receipt. Please try again.”
However now I have another problem however where my donor dashboard is showing completely white… definitely a fatal error, not sure what did this but I have not gotten any emails from WP yet.
