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How can I fix this error message: DMS Viewer is not installed or installed version is not correct. Update DMS Viewer installation from login page and try again.

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Hoping there is an add-on/plugin or some way to fix this issue.

Hoping there is an add-on/plugin or some way to fix this issue.

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I saw your more recent post first. Continue discussion there?

https://support.mozilla.org/en-US/questions/928725