How to solve the complie error when realvirtual io package install in HDRP project

Dear,

Thanks for your support.

I have another problem when realvirtual io package install in HDRP project.

1) Unity 6 LTS Version (6000.0.62f1)

2) Create HDRP Project

3) Install Reavirtual IO Digital Twin Professional (6.0.8)

→ Compile error occurs (see image below)

4) Switch to HDRP Menu (in realvirtual menu)
※ Render Pipelines > Switch to HD render Pipeline (HDR) > Path Tracing & Ray Tracing (Both Try)

→ Compile error still occurs (see image below)

I would like to request guidance on how to resolve this issue so I can use realvirtual io in HDRP project.

Best regards,

Seokhyun Lee