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https://www.macissues.com/2015/05/08/how-to-fix-your-mac-not-waking-from-sleep/

Remove your the system’s hibernation file

A final approach you can try is to remove the system’s hibernation file, which is the hidden file that is written to whenever your Mac goes into hibernation mode. While the system will recreate this file if it is missing, if present then it will just write to the existing file. As a result, any damage to this file may prevent the system from reading it when waking from sleep. To fix this, you can force OS X to recreate it by deleting it, which can be done by running the following command in the Terminal:

sudo rm /var/vm/sleepimage