Comment 117 for bug 1641290

@Angel

> (process:3360): libfprint-poll-CRITICAL **: 20:49:10.548: fpi_timeout_add: assertion 'fpi_poll_is_setup()' failed

It appears that you have libfprint with a bug that's been fixed some time ago. It looks like an unstable version could've appeared in repos due to misunderstanding of some sort (see https://gitlab.freedesktop.org/libfprint/libfprint/issues/143 for more info). You can try a newer git master, downgrade or wait till your pakage source (ppa? because ubuntu repos still have an older version) gets an update.