Hi, Thanks for reporting this bug.
It looks like this bug has been reported upstream here: https://github.com/micahflee/torbrowser-launcher/issues/276 It's due to the fact that TBB 7.0 has been released but in https://dist.torproject.org/torbrowser/update_2/release/ only the old version is listed, even though it is not downloadable anymore. I'll try to see what can be done. Cheers! u.