What does the message "hook_flag_access: ignore" mean, and how do I turn it off?
Sounds like you need to disable the flagaccesstest module.

The problem is, in flagaccesstest.info the module declares

hidden = TRUE


So, it doesn't show up in Drupal module admin.

You could probably still disable it with Drush

drush dis flagaccesstest


or even (last resort) SQL:

UPDATE system SET status = 0 WHERE name = 'flagaccesstest';


Alternatively, in flagaccesstest you could comment out

;hidden = TRUE


and then disable the module from Drupal module admin UI.