paper don't compile

[TalIfargan]

Sometime when a dataframe is converted to latex using the built in to_latex() method the final latex product is not compiling.
I have recognized that the error comes from the use of either multirow and multicolumn latex commands and providing hypertargeted number as their first inputs instead of a plain integer.

See commit 94ed3db for example paper that dosen't compile and possible fix path on the same branch.