Class could not be found. Did you mean beast.evolution.speciation.SpeciesTreePrior?
Perhaps a package required for this class is not installed?
Error detected about here:
<beast>
<run id='mcmc' spec='MCMC'>
<state id='state' spec='State'>
<stateNode id='Tree.t:Species' spec='starbeast2.SpeciesTree'>
Kindly,
Palesa