On an Ubuntu 64-bit version 22.04 device, I have opam and ocaml installed, with ocaml having version 4.08.0 and I would like to upgrade it to 5.1.0 to use the Effects package. However, running opam install ocaml.5.1.0 the error in the attached photo arises. What can I do to fix this problem?
I have tried looking up this issue in other forums, but I couldn't find anything since this version is still quite new.
In short, you need to create a new opam switch for OCaml 5.1.0 and then switch to it.
opam update
opam create switch 5.1.0
opam switch 5.1.0