Hi there, several of my downloads are showing a lock symbol and are returning an 'unknown protocol' message. Despite showing that there are several peers seeding, once I download the torrent file and open it in Tixati, I cannot download and there are no peers found. Please help. Thank you.

The lock symbol is described in this help page: Transfers View. Did you get "unknown protocol" message when loading magnet link or torrent file?

Once I got this error:
It was a magnet link without a tracker, it had tr=dht%3A%2F%2Finfohashofthetorrent instead. I don't remember where I got this magnet link.