Results 3 issues of Chaztikov

Hi There, Thanks for your work on this. I am unfortunately getting an error in the "uq_coffee_class.py" example now, whereas I was not

Errors arise if I run (as written in some of the example scripts) ```julia using Pkg using JuliaFEM import JuliaFEM import JuliaFEM: assemble!, get_unknown_field_name, Problem::FieldProblem type Truss