Bug
I use Unity6000.0.58f version and I imported Realvirtual Digital Twin Starter 6.3
And I got these errors

Answer
Hi sandong0313,
thanks for the report. These compile errors come from a Unity / realvirtual version mismatch: the realvirtual Digital Twin Starter 6.3 is built for a newer Unity 6000 LTS than 6000.0.58f, so the scripts do not compile on your Editor.
Two options:
1) Switch your project to the Unity 6000 LTS version that Starter 6.3 targets and re-import the package.
2) Or stay on Unity 6000.0 and use the matching realvirtual 6.0.x Starter release instead of 6.3.
Installation guide: https://doc.realvirtual.io/
To point you to the exact compatible build, could you confirm your Unity version (Editor > About)?
Best regards
Customer support service by UserEcho
Hi sandong0313,
thanks for the report. These compile errors come from a Unity / realvirtual version mismatch: the realvirtual Digital Twin Starter 6.3 is built for a newer Unity 6000 LTS than 6000.0.58f, so the scripts do not compile on your Editor.
Two options:
1) Switch your project to the Unity 6000 LTS version that Starter 6.3 targets and re-import the package.
2) Or stay on Unity 6000.0 and use the matching realvirtual 6.0.x Starter release instead of 6.3.
Installation guide: https://doc.realvirtual.io/
To point you to the exact compatible build, could you confirm your Unity version (Editor > About)?
Best regards