Viewport update to 2.15.2 causes exception on some instances

Description

In some cases, the update to 2.15.2 causes an error when trying to access any Viewport.

Workaround

Restart Confluence.

Environment

None

Status

Assignee

Unassigned

Reporter

Sync User [K15t]

Labels

None

Participants

None

Deployment

None

Components

Fix versions

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