I have check an error log and have received this error at about the same time I was accessing this type of page...
[15-Jun-2016 22:03:35 America/Denver] PHP Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 9332483 bytes) in /home/cocempro/public_html/portal/includes/database/database.inc on line 2171
And while double checking that maybe it wasn't just my browser, I also have received this error from Internet Edge (I don't normally use it, just thought I'd try):
SERVER ERROR - The server encountered an unexpected condition that prevented it from fulfilling the request. GET - http://example.org/admin/structure/types/manage/site-photograph-gallery/fields/field_-images
So is this with my server or my Drupal installation? I will clarify that I have found that no other field type (either text, date, summary, whatever) is affected by this, only file and image field types.
------EDIT---- Oh and none of the other tabs (such as Widget settings, or delete) are affected by this error...