[orca-list] I can not access the help

[José Vilmar Estácio de Souza <vilmar informal com br>]

Hi all.
Using the latest orca from git I can not access help.
If I go to preferences page and press space bar in the help button, I 
receive the following message:

Unable to load page
The requested URI "ghelp:orca" is invalid

Any idea?
Thanks.