I tried a fresh new install of Ruby 2.7.0 and 2.5.8 and both versions failed to start the interpreter, ending with this error:
(default installation under default folder with default checkbox, no customization)
I tried to search this error which seems to be some invalid conversion of a U+2013 symbol (en “dash” symbol) character from one encoding to another, but there is not even any program that I wrote, it is all default ruby files. I suspect this is some file open/searching and it probably finds some path with the weird dash and then the interpreter fails to start. Unfortunately I am not aware of any weird dash in my system, anyone has idea how to fix this??