I was adding a new Project and I lost 90% of my tasks. I need to recover everything. It is the work of many months. Can you help me?
I can assure you that tasks can't be lost in our app unless removed manually or added offline, not synced and the app was deleted before the sync.
That said, please clarify - when exactly did this happen? You clicked on "Add project", typed in the name and at this moment all tasks from all other projects have vanished? Are they gone in more than 1 browser?
Also, can you see this data in the backups created automatically in Settings -> Backups?