Oh, dingdangit. I just realized what your problems are.
This is a problem with Panda running on international versions of Linux. We already discovered it here in this thread: https://discourse.panda3d.org/viewtopic.php?t=310
There’s a fix checked in for future versions of Panda, but it hasn’t been released yet. In the meantime, the workaround is to type this command:
export LC_NUMERIC=C
in the shell before running Panda.
David