Comment 13 for bug 1969939

Hi,

sorry, I'm currently beeing on a trip, sitting in a hotel with rather limited technical equipment.

I also ran into this undefined method `to_sym' for nil:NilClass problem, but I also found the error message

Failed to load library 'msgpack' for feature 'msgpack': cannot load such file -- msgpack

After

apt install ruby-msgpack

that error was gone.

@Adrian: please check. If this helps for you too, then it is just a missing dependency.