No Categories No New Post

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Warning: Creating default object from empty value in /home//public_html/wp-admin/includes/post.php on line 631

Warning: Creating default object from empty value in /home//public_html/wp-admin/includes/post.php on line 632

i am posting on my 2 blogs and suddenly it all got stucked up
now i am seeing this
https://puu.sh/nTi64/5ea1167887.png

https://puu.sh/nTi7c/cadac58ec9.png

Also the categories are missing please see below
https://puu.sh/nTi8d/252b34555d.png

Can anybody help me to fix this issue
Thanks