If External Edit is used to edit a document containing a single quote e.g
any attempt to save the document in OpenOffice fails with the message:
If the document does not have the single quote in the name, the edit is successful.
Looking at the logs, the file name is correctly encoded as Vaccination%20Certificate%20-%20Muffet%20O%27Brian%20%1%20Nov%2019.odt so the problem may be due to the way OpenOffice handles encoding of single quotes.
To avoid this, remove single quotes from path names before generating URLs.