“desverre” is a common Norwegian spelling error.
The standard spelling is “dessverre.”
Example
[Vers]
Det er desverre sant[Vers]
Det er dessverre santThe fix
In the workbench this finding carries one control, labelled Replace with dessverre. The change is contextual, so it is previewed as a diff in your document first and applies only when you confirm it.
Source
The guideline this rule enforces, as cited on every finding it reports:
Ord som mange lurer på verified Frequently searched Bokmål spellings, including dessverre and interessant