warning: Invalid argument supplied for foreach()

Hi I hope I have posted his in the right place.

I have only just started using drupal a few days ago and have run into this error. I have tried searching for it but am left confused. Thanks fr any help.

I am not sure if these two things are part of the same problem or are seperate issues so sorry if they are seperate.

Under Edit 'Buddylist Gallery' I get the error

warning: Invalid argument supplied for foreach() in /Users/Robyn/Sites/Drupal/sites/all/modules/panels/panels_views/panels_views.module on line 1292.

I also get a blank white screen when i click on the configure or any of the avatar blocks.

Thank you for your help