Crash on import

Hello !

I'm trying to import an ics file exported manually from Outlook with khal 0.10.5 installed with homebrew on Linux Mint 21

I created a configuration file with khal configure and edited. This is the actual file. Worth mentioning is that the directory the path configuration field points to exists. It was created by khal with mode 775 and it belongs to me:me !

[calendars]
  [[work]]
    path = ~/.local/share/khal/work
    color = dark green
    readonly = True
    type = calendar

[locale]
timeformat = %H:%M
dateformat = %d/%m/%Y
longdateformat = %d/%m/%Y
datetimeformat = %d/%m/%Y %H:%M
longdatetimeformat = %d/%m/%Y %H:%M

When I execute

$ khal import -a work ~/Téléchargements/calendar.ics

It prints the first event available and then the following error message :

critical: No writable calendars found, aborting import.

I guess I'm doing something dumb 😄

Reproduce the report with khal 0.10.5 using khal import -a work ~/Téléchargements/calendar.ics and the configuration shown. Trace the import path and writable-calendar validation; done means the reported Outlook-exported ICS imports successfully or the configuration error is reported clearly.