Handle won't connect

A home owner from Wisconsin says:
(Preface: I am not homeowner saavy nor handy so I apologize if I don't know/use all the correct terminology)

We bought a home and none of the handles will connect to the base. When we open a window we have to stick the handle into the port, turn it to open the window, but the handle will not stay into the port and just falls off. I do not know what parts I need to buy to replace/fix the issue. Any help is greatly appreciated!!!
User submitted photos of a window operator.
Profile picture of Paul
Paul from SWISCO responded:
Hello! Sounds like either the handle stem is worn out or the socket in the operator is damaged. If it's just the handle, you could consider our 39-226 as a replacement. If the socket in the operator is damaged, however, you will need to replace the whole operator.
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