Changes to stories made while in PLAN mode give error message

[Keith_Unekis]

I have an issue where a team is using advanced roadmaps to add issues/tasks and epics. When the team tries to add a story, the changes are not committed to the project and gives an error 'Could not be committed for unknown reason' I checked the permissions and when they add tasks or epics, the changes are accepted and the project is updated. It is just the Story, I can't figure out please help!!! I am the site admin and i get the error. 

[Trudy Claspill]

Have you checked the workflow for the destination project to see if there might be Validators that are blocking the creation of the Story?

[Keith_Unekis]

yes I did, there are no extra validators, just basic settings