Post Thumbnails and Images are not showing Up

I have screen record my error
https://www.youtube.com/watch?v=A9QBCoZDqMs

Have you tried:

– deactivating all plugins to see if this resolves the problem. If this works, re-activate the plugins one by one until you find the problematic plugin(s).

– switching to the default theme to rule out any theme-specific problems.

– resetting the plugins folder by FTP or PhpMyAdmin. Sometimes, an apparently inactive plugin can still cause problems.

Thank you for the reply
a plugin caused this error
Now Fixed