I tried entering in debug mode and I got this:
XPCOMGlueLoad error for file /home/user/.tb/tor-browser/Browser/libxul.so:
/usr/lib/x86_64-linux-gnu/libstdc++.so.6: version `GLIBCXX_3.4.23’ not found (required by /home/user/.tb/tor-browser/Browser/libxul.so)
Couldn’t load XPCOM.