Call to undefined method mysqli_stmt::get_result()

sorry I might be a bit stupid here. But when I run execute in the prepared query I get error "Call to undefined method mysqli_stmt::get_result()"

so my thinking is:
My server meets the requirements
my data is good
I have prepared statement as per docs
I have executed the statement as per the docs

But execute is generating the error, and for the life of me I dont know why? :-)

The prepared query is erroring out on itself? Not becuase i'm get_results() explictly or i'm calling get_results() incorrectly.