The link on the sidebar of the documentation labeled “Blueprint Function Libraries” sends you to the String Handling documentation page (https://docs.unrealengine.com/latest/INT/Programming/UnrealArchitecture/StringHandling/index.html). The Blueprint Function Libraries documentation page is located at: https://docs.unrealengine.com/latest/INT/Programming/BlueprintFunctionLibraries/
This might be confusing for people who are trying to access the blueprint function libraries documentation page and don’t know what the actual URL is.
Thanks! Probably just a copy paste error. We’ll get it fixed up.