It seems to me the problem is that evolution is not able to connect to desktopcouch, so let's check 2 things:
1) What server type do you have for your Ubuntu One addressbook? (Right click on the addressbook in the left tree, ->Properties)
2) Run, in a terminal, the following commands:
$ evolution --force-shutdown $ /usr/lib/evolution/evolution-data-server-2.28
When this last command shows a 'Server up and running' message, start evolution and try to open the U1 addressbook. Then, copy all the output in the terminal and paste it here, please
It seems to me the problem is that evolution is not able to connect to desktopcouch, so let's check 2 things:
1) What server type do you have for your Ubuntu One addressbook? (Right click on the addressbook in the left tree, ->Properties)
2) Run, in a terminal, the following commands:
$ evolution --force-shutdown evolution/ evolution- data-server- 2.28
$ /usr/lib/
When this last command shows a 'Server up and running' message, start evolution and try to open the U1 addressbook. Then, copy all the output in the terminal and paste it here, please