I've installed the Pull request guidelines plugin, linked with our repository, added the CONTRIBUTING.md file which is rendering correctly when I click on "Pull request guidelines" on the top right in the Pull request.
When the modal opens up and I try to click on the + sign next to the L2 header, the spinning wheel for a second appearing and after the + sign comes back instead of the tick sign like on the video here: https://prguidelines.atlassian.io/
So practically we can not tick off L2 headers on the checklist.
I tried to reinstall the BitBucket plugin, but same behaviour.
I installed from selecting the plugin in "Find new add-ons".
On an other ticket you guys suggested to install using the "https://prguidelines.atlassian.io/" url, but when I try, get this error: