cannot find rack plugin in bitwig - linux

I am on a linux machine, running bitwig-studio as a host for the rack plugin. when i scan for plugins i got an error message as follows:

vst/VCV Rack 2 FX.so

com.bitwig.flt.library.metadata.reader.exception.CouldNotReadMetadataException: could not read metadata: createAEffectInstance returned NULL

I am on manjaro linux. Any idea what it could be? thanks!!