Unable to set URL alias
Sounds to me like you just have to add an URL alias for ´portfolio/4´.


Go to Configuration > Search and metadata > URL aliases.
Click "Add alias".
Enter portfolio/4 as "Existing system path" and branch-locator as "Path alias".
Hit Save and it should be ok.


If you want nodes to have a similar path alias, e.g. branch-locator/node-title, you should look into the Pathauto module.

Cheers,