Kung Pow
Try the following steps and you should be good to go to and if not, just let me know.
I recommend that you go to app management in settings and force stop TiBu and delete data and cache but keep Tango. (movie reference)
The data is safe even though you cleared it, because it is also stored in a sub folder of the data folder that's on your accessible part your SD.
Then start it up again and TiBu should be all good.
If the problem remains, go back to app management and this time stop and clear TiBu again and then do the same with superuser app in all column of app management.
This will result in you having to re open all su rights requesting apps and accept su rights for all.
That should pretty much solve the problem if the first suggestion wasn't a success.
Report back any problems or progress.
And of course you can always try to do an uninstall TiBu and then reinstall.
Hope this works for you
I can't get my TiBu to gain root access. Its says it has been granted superuser access, but the app itself says otherwise. I've used TiBu for all the other builds with no problems
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danceswithbongs