make start from poly-org repo triggers error

[matthuszagh]

I'm experiencing a couple issues when using poly-org. I tried to debug these by running make start from the poly-org repo. However, when I attempt to open an org buffer I get

File mode specification error: (wrong-type-argument eieio-object #s(pm-polymode unbound polyorg-polymode nil poly-org-hostmode (poly-org-innermode) (pm-exporter/pandoc) nil nil nil nil polymode-minor-mode-map nil poly-org-mode unbound nil nil nil) obj)

Have you encountered this? This is from an up-to-date poly-org mode and master branch emacs.