How do I get my calendar back?

I think my problems started when I tried to add google calendar.

1) Is there a way of fixing the gnome calendar so it doesn't crash upon launch?

I've listed 30 lines of log code that occur immediately after the crash... something about Evolution?

I tried uninstalling and reinstalling the gnome calendar with the software manager and it still crashes upon launch.

Would using terminal be more appropriate and what commands should I use?

You know, I'm frustrated.
Thanks

yes, we're interested.
also tell us where you got that log code.

menu> all applications> logs > all > export files to a file

11:16:23 wpa_supplicant: wlp3s2: WPA: Group rekeying completed with 22:56:cd:0c:86:2e [GTK=CCMP]
11:13:14 kernel: gnome-calendar[4502]: segfault at 0 ip 00007fa998808cea sp 00007fffba67a090 error 4 in libc-2.28.so[7fa9987ee000+14d000]
11:13:13 systemd: Started Evolution address book service.
11:13:13 dbus-daemon: [session uid=1000 pid=1149] Successfully activated service 'org.gnome.evolution.dataserver.AddressBook9'
11:13:13 systemd: Starting Evolution address book service...
11:13:13 dbus-daemon: [session uid=1000 pid=1149] Activating via systemd: service name='org.gnome.evolution.dataserver.AddressBook9' unit='evolution-addressbook-factory.service' requested by ':1.112' (uid=1000 pid=4541 comm="/usr/lib/evolution/evolution-calendar-factory-subp" label="unconfined")
11:13:12 systemd: Started Evolution calendar service.
11:13:12 dbus-daemon: [session uid=1000 pid=1149] Successfully activated service 'org.gnome.evolution.dataserver.Calendar7'
11:13:11 systemd: Starting Evolution calendar service...
11:13:11 gnome-calendar: g_variant_get_boolean: assertion 'g_variant_is_of_type (value, G_VARIANT_TYPE_BOOLEAN)' failed
11:13:11 dbus-daemon: [session uid=1000 pid=1149] Activating via systemd: service name='org.gnome.evolution.dataserver.Calendar7' unit='evolution-calendar-factory.service' requested by ':1.105' (uid=1000 pid=4499 comm="/usr/lib/flatpak/flatpak-dbus-proxy --args=32 " label="unconfined")
11:13:10 systemd: Started Evolution source registry.
11:13:10 dbus-daemon: [session uid=1000 pid=1149] Successfully activated service 'org.gnome.evolution.dataserver.Sources5'
11:13:10 systemd: Starting Evolution source registry...
11:13:10 dbus-daemon: [session uid=1000 pid=1149] Activating via systemd: service name='org.gnome.evolution.dataserver.Sources5' unit='evolution-source-registry.service' requested by ':1.105' (uid=1000 pid=4499 comm="/usr/lib/flatpak/flatpak-dbus-proxy --args=32 " label="unconfined")
11:13:10 systemd: Started Portal service.
11:13:10 dbus-daemon: [session uid=1000 pid=1149] Successfully activated service 'org.freedesktop.portal.Desktop'
11:13:10 systemd: Started Portal service (GTK+/GNOME implementation).
11:13:10 dbus-daemon: [session uid=1000 pid=1149] Successfully activated service 'org.freedesktop.impl.portal.desktop.gtk'
11:13:10 systemd: Starting Portal service (GTK+/GNOME implementation)...
11:13:10 dbus-daemon: [session uid=1000 pid=1149] Activating via systemd: service name='org.freedesktop.impl.portal.desktop.gtk' unit='xdg-desktop-portal-gtk.service' requested by ':1.106' (uid=1000 pid=4508 comm="/usr/libexec/xdg-desktop-portal " label="unconfined")
11:13:10 systemd: Starting Portal service...
11:13:10 dbus-daemon: [session uid=1000 pid=1149] Activating via systemd: service name='org.freedesktop.portal.Desktop' unit='xdg-desktop-portal.service' requested by ':1.105' (uid=1000 pid=4499 comm="/usr/lib/flatpak/flatpak-dbus-proxy --args=32 " label="unconfined")
11:13:06 systemd: Started flatpak-org.gnome.Calendar-4489.scope.
11:13:06 dbus-daemon: [session uid=1000 pid=1149] Successfully activated service 'org.freedesktop.Flatpak'
11:13:06 systemd: Starting flatpak session helper...
11:13:06 dbus-daemon: [session uid=1000 pid=1149] Activating via systemd: service name='org.freedesktop.Flatpak' unit='flatpak-session-helper.service' requested by ':1.103' (uid=1000 pid=4489 comm="/usr/bin/flatpak run --branch=stable --arch=x86_64" label="unconfined")
11:13:06 systemd: Started flatpak document portal service.
11:13:06 dbus-daemon: [session uid=1000 pid=1149] Successfully activated service 'org.freedesktop.portal.Documents'
11:13:06 systemd: Started sandboxed app permission store.
11:13:06 dbus-daemon: [session uid=1000 pid=1149] Successfully activated service 'org.freedesktop.impl.portal.PermissionStore'
11:13:06 systemd: Starting sandboxed app permission store...
11:13:06 dbus-daemon: [session uid=1000 pid=1149] Activating via systemd: service name='org.freedesktop.impl.portal.PermissionStore' unit='xdg-permission-store.service' requested by ':1.101' (uid=1000 pid=4473 comm="/usr/libexec/xdg-document-portal " label="unconfined")
11:13:06 systemd: Starting flatpak document portal service...
11:13:06 dbus-daemon: [session uid=1000 pid=1149] Activating via systemd: service name='org.freedesktop.portal.Documents' unit='xdg-document-portal.service' requested by ':1.44' (uid=1000 pid=1395 comm="cinnamon --replace " label="unconfined")

Did you install gnome-calendar as a flatpack?
Bloody hell, I think Ubuntu devs have really lost it.

(I know it's Mint, but it's still Ubuntu)

If you want I can generate Moon phases, sunrise, towering, sunset. Dates, time: hour, minute, second - for the selected geographical place.
Chris

>Did you install gnome-calendar as a flatpack?<

Yes, I think I did. I found it on Mint's software's manager.
Now what?

Coincidentally? Yesterday there was a new and large system update in the Linux Mint update manager.
I did a search in software manager for gnome calendar and TWO gnome applications appeared.
I dl'ed the first and I now have a calendar.
The calendar shows three days of weather.... my old appointments and info were not lost, just like before.
Was this a pilot error, as in mine? or what happened I have no idea, and by the number of replies to this problem I still have to wonder.

At some point in the recent past Ubuntu decided to integrate this flatpak or snappy thing or whatchamacallit into their "Software Store" (another misnomer for something that doesn't cost anything ).
On one virtual install I went through the motions of disabling that; basically by uninstalling flatpak or snap and their software store integration packages.

And Linux Mint happily builds on what Ubuntu LTS provides, so this applies to Mint, too.

On a more positive note, I can only recommend to use a sane distro, maybe debian.