Hosting support changed PHP Version to 7.1, so I successfully activate YOP Poll plugin and made migration. Unfortunately I can see in WordPress Admin Console only first 4 polls, so only these polls are available on Poll Archive page. What could go wrong?
The question in hand is resolved. Hosting provider reported mysql crash, and futher investigation resulted in corrupt structure of table wp_postmeta. After applying mysql routine “repair table” the featured images are now showing and addition of them works fine.
I encountered the same problem after upgrading from 3.6 to 3.6.1 this night. Theme is Custom Community 1.17.3 – all featured images disappeared and I can’t reset them via Admin. Neither error is displayed neither featured image thumbnail becomes visible!
