Here is the summarized and easily readable version of my Qubes-Whonix-17 Tor Control Panel snowflake proxy fix/installation guide. The full version of my guide can be found at the bottom of the page. The next Whonix release likely will not need this procedure.

Qubes-Whonix Tor Control Panel with working Snowflake Proxy Quick Start Guide

1) whonix-workstation-17 template terminal: Copy updated snowflake-client to gateway template from workstation template:

qvm-copy-to-vm whonix-gateway-17 
/var/cache/tb-binary/.tb/tor-browser/Browser/TorBrowser/Tor/PluggableTransports/snowflake-client

Copy updated snowflake client to /usr/bin, make executable, use nano to edit bridges file:

sudo cp ~QubesIncoming/whonix-workstation-17/snowflake-client /usr/bin/snowflake-client
sudo chmod og+rx /usr/bin/snowflake-client
sudo nano /usr/share/anon-conection-wizard/bridges_default`

"Bridge snowflake 192.0.2.3:80 
2B280B23E1107BB62ABFC40DDCC8824814F80A72 
fingerprint=2B280B23E1107BB62ABFC40DDCC8824814F80A72 
url=https://1098762253.rsc.cdn77.org/ 
fronts=docs.plesk.com,www.phpmyadmin.net 
ice=stun:stun.l.google.com:19302,stun:stun.antisip.com:3478,stun:stun.bluesip.net:3478,stun:stun.dus.net:3478,stun:stun.epygi.com:3478,stun:stun.sonetel.com:3478,stun:stun.uls.co.za:3478,stun:stun.voipgate.com:3478,stun:stun.voys.nl:3478
 utls-imitate=hellorandomizedalpn", "Bridge snowflake 192.0.2.4:80 
8838024498816A039FCBBAB14E6F40A0843051FA 
fingerprint=8838024498816A039FCBBAB14E6F40A0843051FA 
url=https://1098762253.rsc.cdn77.org/ 
fronts=docs.plesk.com,www.phpmyadmin.net 
ice=stun:stun.l.google.com:19302,stun:stun.antisip.com:3478,stun:stun.bluesip.net:3478,stun:stun.dus.net:3478,stun:stun.epygi.com:3478,stun:stun.sonetel.net:3478,stun:stun.uls.co.za:3478,stun:stun.voipgate.com:3478,stun:stun.voys.nl:3478
 utls-imitate=hellorandomizedalpn"

5) Shutdown whonix-gateway-17 template 6) Restart sys-whonix 7) Start Tor Control Panel

Click "Stop Tor" Click "Configure" Select "Bridges type" → "snowflake" Click "Restart Tor"