when registering or logging in with Facebook

 Unfortunately a query has failed [UPDATE boss_f_member_custom_fields SET field_='US' WHERE (mf_member_id=8) LIMIT 1] [Unknown column 'field_' in 'field list'] (version: 10.0.10, PHP version: 5.6.30, URL: /index.php?page=capture)

The staff have been provided a ‘stack trace’ which may help them diagnose the problem.

I got this same error on my last install and thought it was a problem isolated to that one, but I reinstalled and now I'm getting the same error.

I have quite a few CPFs, but they are all restricted to a subscription based group and are not accessible by regular joining members.

Are you able to send in a stack trace? You can enable error emails to go to you in your notification settings, they should include the stack traces members don't have access to see.

Also where's the comma in this?
"when registering or logging in with Facebook"

Do you mean:
"when registering, or logging in with Facebook"
or:
"when registering or logging in, with Facebook"

i.e. Are you only talk about Facebook?

It seems to be intermittent because I can't reproduce the error at this time.

It happened when I tried logging in with a new Facebook account for the first time. I deleted the account and tried to "re-register", but it's not giving me the same results.

Unfortunately I didn't save the stack trace. But I'll reply to this topic when it happens again and provide it to you.

Actually I believe I've traced the issue. This should fix it: