My headset only works on mirror mode

I have a old HTC VIVE, the first model, and as the title says, when i put it in the "extended" mode on my pc ( as SteamVR asks me to do), the display turns off after around 1 second.

I also get this error message that says:

"SteamVR failed initialization with error code VRinitError_IPC_CompositorConnectFailed: "Shared IPC Compositor Connect Failed (306)"

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Please verify SteamVR is properly installed and try again."

Please help.