No Available release found On the module update area, my install of 7.56, can seem to find matches to core and a few modules. 

How do I begin to fix this?



What I've tried so far:

Based on translating an answer in  Cannot update drupal8: “No available releases found” to v7, I attempted 

drush vdel update_last_check -y
drush rf
drush cc all
drush cron


This failed to do anything meaningful.
Nothing helped in our case, but running the following command:

drush sql-query "truncate cache_update"