Hi, Sorry I think you might find this jump from 4.20 to UE5EA too large. There is the NDI SDK which does not have source code anymore and the original plugin is 4.20 there is a huge amount changed from 4.20 to 4.27, and hence to UE50EA
“EngineVersion” : “4.20.0”,
“Description” : “Implements a media player using Newtek’s Network Device Interface (NDI).”,
also, the “Removal of support notice” is not going to make it easy
The pointers at the bottom of the page to the headers are no longer valid.