I understand. But these apps are too useful. Now i tested the other choices like Cinema, Films, Youtube, etc. and all tabs are blank except the Apps tab. I'm not sure if the problem is in the apps or something else.

I tried the tool, and I think despite those errors it manages to back up all that is possible to back up. For instance wifi passwords and some configurations will not be backed up. These errors come from some symbolic links that rsync is not able to copy. On the other hand this backup is not related with the actual flashing of the device, it is just a copy of your home folder in the old device and then you can restore it into your flash device. Once you reinstall all your old applications (this is not backed up either) you should recover almost everything from your old device.