update does not actually update

[crc64error]

I went thru the code and compared yours and mine and I can not get update to work.
There are 4 errors, Line 22, 23, 24, 25
PHP Notice: Trying to get property 'id' of non-object in...
This repeats for 'id', 'title','body',author'
But the code is the same when I compare the two files.

When I create the query for update, there is no error in POSTMAN. The error is in the bowels of server logs