hello, does anyone maybe know what these two warnings might mean?

WARNING: could not open library '/usr/lib/csound/plugins/libcsnd.so'
(/usr/lib/c
sound/plugins/libcsnd.so: undefined symbol:
Tcl_GetStringFromObj)
WARNING: '/usr/lib/csound/plugins/libCsoundVST.so' is not a Csound plugin
library