Please try disabling the recaptcha plugin and then rebuilding and restarting.
When I run
git reset --hard origin/v0.9.3 (Upgrading from 0.9.1)
atal: ambiguous argument 'origin/v0.9.3': unknown revision or path not in the working tree.
Use '--' to separate paths from revisions, like this:
'git <command> [<revision>...] -- [<file>...]'
and then when I run ./nodebb upgrade, I get this error:
Or backup your nodebb dir and overwrite using the latest Git master zip. They say its not supported but worked several versions for me.