If you are getting "Conflicting definitions are in scope for kind Effect", this is because you are using compiler 0.10 with purescript-eff 3.0.0. purescript-eff 3.0.0 is for compiler 0.11.
You should downgrade purescript-eff to 2.0.0 for the time being. Likewise, downgrade purescript-prelude to 2.5.0 and purescript-psci-support to 2.0.0. You can do this by changing the version numbers in bower.json and invoking bower install.