Unable To edit Due Date for User Stories in a defined sprint with End Date.

Added by Shreyas Moolya almost 4 years ago

When I define a sprint with start date: 13-12-2017 and end date:20-12-2017. and if then a User story is created with the due date set within this time then I am unable to 'Edit' the User Storie's Due Date. Kindly provide me a solution for the same.
Also I am unable to move to this above mentioned sprint which gives me an ERROR 500 with logs as:
NoMethodError (undefined method `>' for nil:NilClass):
plugins/scrum/lib/scrum/issue_patch.rb:564:in `block in max_position'
plugins/scrum/lib/scrum/issue_patch.rb:563:in `each'
plugins/scrum/lib/scrum/issue_patch.rb:563:in `max_position'
plugins/scrum/lib/scrum/issue_patch.rb:576:in `move_issue_to_the_end_of_the_sprint'
plugins/scrum/lib/scrum/issue_patch.rb:474:in `update_position'
app/models/issue.rb:210:in `create_or_update'
app/controllers/issues_controller.rb:558:in `block in save_issue_with_child_records'
app/controllers/issues_controller.rb:546:in `save_issue_with_child_records'
app/controllers/issues_controller.rb:168:in `update'
lib/redmine/sudo_mode.rb:63:in `sudo_mode'