Hi @qdmt, I haven’t got a specific answer to your question about using Create Date&Time within a scheduled task, but I have an alternative way of getting current Date&Time…
Use String Manipulation node! 
string(new Date())
This will return current date and time as a string as something like:
Mon Aug 14 13:22:47 BST 2023
which can then be converted to a DateTime using the following format mask:
E MMM d H:mm:ss z yyyy
For convenience, I now have this functionality wrapped in a component on the hub:
further information re String Manipulation’s undocumented features here
I don’t know though whether this will assist with your particular problem re Task Scheduler, but I would be interested to know.