Install Bazel
Open each exercise seperatly (on intellij or any other ide/editor you prefer)
First run bazel build //... --repository_cache="/tmp"
to see the failure, before you try to solve the issue
(Note: Each exercise is in a completely indepedant bazel workspace (which means dependency repo fetching could have ocurred for each exercise)
repository_cache
speeds up fetching by caching rules_scala
repo for all workspaces)