I am not able to create a plan using API Please resolve this issue.
{
"error": "unexpected-error",
"errorMessages": [],
"exception": {
"type": "com.atlassian.rm.common.publicapi.exception.APIErrorCode$Exception",
"message": "Create operation not available!",
"stackTrace": [
{
"className": "com.atlassian.rm.portfolio.publicapi.plan.DefaultPlanAPIService",
"methodName": "create",
"line": 114