example ods-file which shows the error every now and then
CL.ods (application/vnd.oasis.opendocument.spreadsheet), 57.62 KB, created by Martin on 2022-10-20 10:50:34 UTC
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Creator: Martin
Created: 2022-10-20 10:50:34 UTC
Size: 57.62 KB

Attachment is not viewable in your browser because its MIME type (application/vnd.oasis.opendocument.spreadsheet) is not one that your browser is able to display.

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Attachments on bug 151651: 183160 | 183161