Market and Titanium Backup?

[zuben el genub]

I've been getting the error about vending apk every time Titanium Backup does a back up lately. This is twice in one week.

First time this week, uninstalled Market and reinstalled. Market worked.
Today TB ran backup, and I have the vending error again. Uninstall Market and reinstall didn't work this time. I've deleted backup and Market from TB and still no joy.

TB wants a backup and I can't get the update.

I've also searched and read most of the cures and none work. I really don't want to do a factory reset.

Reinstalling a custom rom does NOT apply as I don't have one. I rooted to get rid of bloat.

 

[zuben el genub]

Seems to be a problem with download. If you click install, update, the button doesn't work. Can access everything else and search market. Very funny that this started just as Google played with new update for privacy