Is the plugin compiled in UE4.8 compatible with orther version of the engine?
Not out of the box.
For a minor release like say 4.5 to 4.6 sometimes a simple rebuild will hveit running.
usually youll get a “Warning xxx is depreciated on line xx please use xxx instead” when they change the API a little bit.
You’ll have to generate VS files and then rebuild to find out/fix it. If its a BP only project, just add a dummy c++ class my favorite is a blank actor or bpfunctonlib class.
Let me know if this helps
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