"which" command returns paths with two consecutive slashes
Solution 1:
It looks like that you need to make the directories in $PATH not have a trailing /
ie you has /usr/local/bin/
in your path and it should be /usr/local/bin
It looks like that you need to make the directories in $PATH not have a trailing /
ie you has /usr/local/bin/
in your path and it should be /usr/local/bin