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