@Kunal-Babbar ok well first -
-- you cant export a plugin-or anything- if you havent got the environment set up correctly - and you will only know this by building HISE itself from the source code....
But assuming you have done this, then it looks like HISE cant find the DDL - so this would be the case if
you have used a script node network, and called it from a Hardcoded Master FX and you haven't compiled the DLL
Export>Compile DSP Network as dll