SUMMARY STEPS TO REPRODUCE 1. Open an existing CSV file. 2. Modify it. 3. Try to save it. OBSERVED RESULT An error dialog appears: "Could not save /home/users/test_doc.csv". Running in through command line, the following error occurs: 'calligra.filter.csv.export: Invalid document mimetype "text/csv"' EXPECTED RESULT Expected is to successful save the modified csv file. SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: Fedora 33 KDE Plasma (available in About System) KDE Plasma Version: 5.20.3 KDE Frameworks Version: 5.75.0 Qt Version: 5.15.1 ADDITIONAL INFORMATION