When you have an error like this it’s a good idea to start by doing a google search for the error, in this case “Cannot find libpandaexpress.dll”. There’s already an answer to this question on the forums:
[Cannot find libpandaexpress.dll <- Simple solution(s))
If you have multiple versions of panda3d installed for testing you can create a few batch scripts which just set the PYTHONPATH appropriately before invoking python.
I’ve just updated this manual page to include adding the bin path to panda.pth: panda3d.org/manual/index.php … reparation