Can't say much, I'm really inexperienced but maybe this will help anyone.
I couldn't get the VN to launch using steam initially.
Thankfully I have another VN using the same engine as this one.
Installing and running Saya No Uta (The steam version) once allowed me to bypass the steam api error I was getting on launch.
Everything after that has worked fine.
What does not
What was not tested
I only tested with the default options given in the launcher once I was able to access it.
|Linux Mint 20.1
|Jun 29 2021
|Jun 21 2018
|Arch Linux x86_64
|Jul 28 2013