The usual reason that this disappears is a change of groups. The access is controlled by groups - you have to be in one (or more) groups that have "bulk edit" rights. So, either
You'll need to check what groups you are in and then ask your Jira admins what groups have the permission.
Introducing Jira Cloud for Excel Here at the product integrations team at Atlassian, we are thrilled to announce the new Jira Cloud for Excel add-in! This add-in lets you export Jira data directly ...
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