Unable to create new Plan

[Alex Trecartin]

Hey folks, running into a strange issue when trying to create a new Plan from an existing project. If you try to make one, a message just pops up in the corner saying that an error occurred with a link to Atlassian support. We checked the logs and it seems to be kicking back an 400 error bad request from the plan API. One of the errors mentioned that it couldn't find a valid sprint, so we made one just to test, gave it a valid start and end date, but that did not resolve the issue.

Here's one of the error lines:

2025-09-03 15:18:32,128 http-nio-8080-exec-110 url: /rest/greenhopper/1.0/sprint/2; user: userID INFO userID 918x29834x1 1uj018b IPs /rest/greenhopper/1.0/sprint/2 [web.rapid.sprint.SprintResource] GreenHopper REST method failed with SC = 400 - HTTP 400 Bad Request

[Trudy Claspill]

Hello @Alex Trecartin 

Welcome to the Atlassian community.

What version of Jira Data Center are you using?

Does this happen only when one particular project is specified as the source, or does it happen regardless of what project is specified as the source?

Can you create new Plans by specifying a filter or a board as the source?

Do all users get the same results?

[Alex Trecartin]

Hey, thanks for the quick response. In order:

This is on version 10.7.3.

This happens regardless of which project is selected.

This happens regardless of which method you try to use to make the Plan.

So far myself on an admin account, myself on a user account, and the user who brought this to our attention (assigned as an admin on this particular project) are all running into the same behavior.

Let me know if there's any other information gathering I can do to troubleshoot this issue.

[Trudy Claspill]

Have you previously been able to successfully create a Plan? If so, what has changed in your environment since then?

Have you recently upgraded Jira?

Did you originally obtain Advanced Roadmaps my installing a plugin, or did you get it out of the box with your Jira Data Center installation?

Have there been changes in your network configuration?