I found this message by working with librqbit (9.0.0-beta.0):

Failed to resolve `e79b5ea071ddef1341b48f72bb3ea66a06795a96`: `cannot decode filename bit as UTF-8`.

The problem is going from this line.
Even not critical, but interesting as looks it is related to the library, not the app implementation.

Some trackers to test this infohash:

• udp://[302:68d0:f0d5:b88d::fdb]:6969 - Yggdrasil
• udp://[505:6847:c778:61a1::fdb]:6969 - Mycelium