Does your Camera360v2.uplugin file list the “OpenCV” in its list of plugin dependencies? It is possible that things work locally but not when installed to a fresh UE5 editor install, if you don’t have something like this in your .uplugin file:
"Plugins": [
{
"Name": "OpenCV",
"Enabled": true
}
],
EDIT:
I admit, if that were the problem, I would expect you to be seeing a warning like this when you compile your project:
1>UnrealBuildTool : warning : Warning: Plugin ‘Camera360v2’ does not list plugin ‘OpenCV’ as a dependency, but module ‘Camera360v2’ depends on ‘OpenCV’.