Hi
after completing everthing i uploaded my script to the server.. everything works fine except CLONE ( copy ) in index pages. when i try to clone a row or rows i get this error.. 
it still clones the row but it gives an error.i have searched everywhere and i guess it is an PDO issue with fetch all .. can u please help me.
by the way it works fine on my localhost computer with no problem.

screen shot is here

https://ibb.co/cBtmCk

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mysql on localhost is 5.7.12
mysql on server is 5.6.35

PHP is 5.6

please help asap