Stopped at 32% primary blockchain synchronization

My umbrel is installed on a Raspberry Pi.
Connected to the Internet via Ethernet.
I am using an HDD with a separate power supply for it.
Blockchain synchronization stalled at 32%.
In the umbrel interface, I see 0 peer connections.
The umbrel log indicates a connection problem with TOR.
How can I tell Umbrel a working bridge to connect to TOR?