On my /e/ OS 0.20 (Android 10, Fairphone 3) the Trebuchet-App also kept stopping like 10 days ago. I deactivated the app and updated to /e/ OS 0.21 two days ago. After the update, the “recent” button was still without function.
In the system settings, I chose “Apps and notifications” → “Show all apps” and then switched to “Show system apps” in the three-dots-menu (top right positioned). There I filtered for trebuchet, cleared the cache of the app and activated it again. Now it seems to work again. Maybe this is helping someone with a similar problem.
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