Help with error message please?

Ok so when my members click on other members pages to view the profile they are getting the following error message

checkAction() fatal error. Unknown action ID: 0

Has anyone else had this issue with d7 and if so can you please help me?

Did you recently install any new mods?  I had this issue and when I uninstalled the new mod it was fixed.  Turned out to be something i changed in the coding

No however i did start a new cronjob in my cpanel. You think this may be effecting it?

what was the cron job, but that shouldnt affect this specific site.

also is that the extent of the error, because typically, you would have a file name or something more to go on.

OK so here's an update. When i'm logged in as the ADMIN i can access all member profiles through my site with no problem @ all but when i log in with an account that i create as a normal user all is well except when i click to view another members profile then i get that crazy error message.  Could there be something wrong in the membership levels? because I upgraded certain members to the gold manually

Erica try going to admin>advance setting>profile and decrease the amount of friends to show.