Oct 17 11:36:00 ubuntu ubiquity[1902]: Exception in GTK frontend (invoking crash handler):
 Oct 17 11:36:00 ubuntu ubiquity[1902]: Traceback (most recent call last):
 Oct 17 11:36:00 ubuntu ubiquity[1902]:   File "/usr/lib/ubiquity/plugins/ubi-language.py", line 379, in on_link_clicked
 Oct 17 11:36:00 ubuntu ubiquity[1902]:     preexec_fn=misc.drop_all_privileges)
 Oct 17 11:36:00 ubuntu ubiquity[1902]:   File "/usr/lib/python3.6/subprocess.py", line 709, in __init__
 Oct 17 11:36:00 ubuntu ubiquity[1902]:     restore_signals, start_new_session)
 Oct 17 11:36:00 ubuntu ubiquity[1902]:   File "/usr/lib/python3.6/subprocess.py", line 1344, in _execute_child
 Oct 17 11:36:00 ubuntu ubiquity[1902]:     raise child_exception_type(errno_num, err_msg, err_filename)
 Oct 17 11:36:00 ubuntu ubiquity[1902]: FileNotFoundError: [Errno 2] No such file or directory: 'sensible-browser': 'sensible-browser'