OK thanks. I've filed an issue here: https://github.com/google/mesop/issues/345 if you could share with us a repro (the Mesop code you're running) on the issue, that would be helpful in debugging this.
If you take a look at the "table" example on the demo gallery: https://google.github.io/mesop/demo/ it shows how to use Pandas w/ Mesop, so I'm not sure what's going on.
ok, will look at the issue and add an example if possible. The code I was executing was one of the example code present on the site. So nothing special.