entry point

Hello and good day
I hit an error that i do not know what to do with. I am running
rails
server so that I can see http://localhost:3000/pages/home. Then I
get
the error
"The procedure entry point rb_str2cstr could not be located in the
dynamic link library msvct-ruby191.dll"
I am also getting an error - no driver for sqlite3 found - on the tab
that I typed in the address.

is there a way to stay with one version of all of this? Every time i
try to learn something new, something else doesn't work and it takes
me a day to get it figured out. by that time something else has
changed.

thanks
jeff