Thank you for the suggestion.
Have replaced localhost to both lan connection IP address and wireless connection IP address, both do not work. “Roon couldn’t connect to HQPlayer”
It states that “requirks HQPlayer Desktop 4.16.2+ or HQPlayer Embedded 4.29.3+”. Am on 481 2(probably 4.8.1?). Just downloaded the latest 4.19.0, same outcome.
After fiddling around with the HQPlayer settings, found that by using “NetworkAudioAdapter IPv6” under Backend, it works now.
Thanks everyone. 