2013-12-06, 18:05
It really sounds like your computer is having trouble pulling the addon file from the addon repo. You can try to download and install the addon directly. On the github page (https://github.com/robweber/xbmcbackup) there is a "download ZIP" option in the lower right-hand corner. Download this to your computer and then in XBMC->Settings->Addons choose "install from zip file". Browse to the zip file on your computer and the addon should install. It doesn't use any dependencies so there really should be no problem.
If this doesn't work there is a lot of info about your systems that will be needed to help any further. What kind of OS are you using, version of XBMC, can you provide a debug log, etc. Try the zip file first and see if that fixes your issues.
If this doesn't work there is a lot of info about your systems that will be needed to help any further. What kind of OS are you using, version of XBMC, can you provide a debug log, etc. Try the zip file first and see if that fixes your issues.