I found a solution to the problem!! I no longer get the startup error and it now packages the project fine. Sharing here in case anyone else has this issue. Very simple fix:
This fix is for the Oculus UE build.
Ensure the plugins are not in the engine dir. Rebuild the engine without the plugins if they were. Ensure the plugins are in the project dir.
Open the .uproject file of each plugin in a text editor and change the line: “EngineVersion”: “4.26.0” to “EngineVersion”: “4.26.2”. I also changed line “VersionName”: “4.26.0”, to “VersionName”: “4.26.2” but I don’t think that is needed.
Then delete the binaries and intermediate folders of each plugin. Regenerate project files and rebuild the project in VS.
Boom, problem solved. I hope this helps.