ThunderHub/Lightning-send/Unknown error

Hello, on Thunderhub - home/lightning wallet/send/is key send-yes/paste the public key/decode/select amount os sats/send - then RED Unknown error sign popps up every time. I’m trying to send sats to a new channel but won’t let me. Any ideas as to what I’m doing wrong? Thank you!

mean the destination node is offline or the channel is not yet published through gossip. Takes time if is the first channel


OK, my node has been up for about 2 months and it is my first attempt to pay my friend, which is my first channel connection too. Thank you very much for your reply and i will check your recommendation.