When trying to add a "Log Work" action and set to copy the value from a field to Automation rules, the rule can't be published

Issue Summary

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:

An unknown error occurred. Please reload and try again.

Steps to Reproduce

1. Create a new rule with any trigger;
2. Add the "Log Work" action and set to copy a value from a date/time field (as the screenshot below);
3. Click to publish.

Expected Results

Publish the rule without any errors

Actual Results

Errors when publishing the rule. Found only an error 500 in a POST.

An unknown error occurred. Please reload and try again.

Workaround

Use smart value, for example:

{{issue.created}}