Email app stop working after update

When coming back from my vacations I updated the Nextcloud apps…

I cant make the latest mail app work in any way (they get loading eternally), so I managed to download the last version that worked, the 1.9.4 but it doesnt let me install it, even if I uninstall the newer version previously.

Is there any workaround to downgrade this plugin? 1.10.1 doesnt work at all for us.