[Sally] $ run [info] Updating {file:/Users/MyName/Desktop/sally/todolist/}Sally... Waiting for lock on /Users/MyName/Documents/play-2.1.3/repository/.sbt.ivy.lock to be
On my windows machine, I managed to solve the above issue by killing the processes that use that lock file.
Use the following official tool from Microsoft to search for the processes that are using the lock file.
https://docs.microsoft.com/en-us/sysinternals/downloads/process-explorer