When trying to publish a rule where there is a "Log work" action and set to copy the value from a field (created, updated, etc) on "Date started" it does not allow to publish and appear the following error message:
Create a new rule with any trigger;
Add the "Log Work" action and set to copy a value from a date/time field (as the screenshot below);
Click to publish.
Publish the rule without any errors
Errors when publishing the rule. Found only an error 500 in a POST.
Use smart value, for example: