iMAC 2017 crashes when sleep after latest OS Update

my iMAC 2017 keeps crashing and shuts down if i leave it and it goes to sleep.
I then have to hold down the power button multiple times for it to turn back on. This all started happening after i updated my OS to the latest release few days ago.

Can anyone help with this?
iMAC 2017 crashes when sleep after latest OS Update
 
 
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