I am using JIRA Software 7.11.0 on demand. After I added an Activity Stream gadget, the nightmare starts:
- All the top menus are disabled, there is no response and drop-down to click any buttons.
- I can neither move or remove any gadgets even with administrator account, which give me a message:
Sorry, you do not have permission to modify this Dashboard. Your dashboard may be out of sync with the server: please reload the page.

- The system keep kicking me out. Every single click just end my sessions.
Currently, none of my users in the team cannot access their projects since this issue.
Does anyone have any ideas?