Tickets disappeared from board view and 404 error on completed issues

[fursakizci]

Hello,

Some of my Jira tickets have disappeared from the board view unexpectedly. However, I can still see their titles listed in the issue list view. When I try to view all completed tickets or open one of them directly, the page returns a 404 error.

Could you please help me understand why this is happening and how I can recover or view those tickets again?

Thanks in advance.

[Mirek]

HI @fursakizci 

Most of the 404 problems (Not fount) related to Board means that board either does not exist or the user does not have permission to view it.

Is this board created by you (and you are an admin) or someone else that might remove it or change permission so that you are not longer able to access it?