failed to initialize user interface: open /home/user/.local/share/sandboxed-tor-browser/tor-browser/Browser/defaults/pref/autoconfig.js

Started sandboxed-tor-browser with broken system control port (answering "filtered"). On second start of sandboxed-tor-browser the following will happen.

./bin/sandboxed-tor-browser
2016/12/25 04:52:34 failed to initialize user interface: open /home/user/.local/share/sandboxed-tor-browser/tor-browser/Browser/defaults/pref/autoconfig.js: no such file or directory

And refuse to start.

Workaround:

rm -r .config/sandboxed-tor-browser

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