@Simon its not even showing as being available to open in ableton and reaper has a similar issue to fl studio, showing but won't run the plugin

New to HISE here...

I have exported my plugin as a .vst3 along with the .dll, but my plugin won't be located by FL Studio unless I turn off plugin verification. When I do try to open it, I get the following error message:

"There was a problem opening the plugin for an unknown reason. Please make sure it was installed correctly."

Plugin is a sampler with bass oneshots + some fx knobs, if that helps

Help?