The use of the virtual machine may explain the issue, try running the MSM tool executable from a host Windows system?I have the OP8P IN2025 F62 and I was on OOS13 when problems happened...
I downloaded OnePlus_8_Pro_Global_OxygenOS_22.214.171.124.zip. The device is detected by MSM tool ("Connected" message) but I get this error: Sahara Communication Failed: Please try again afer power off phone (PBL:6)
My laptop only has 3.0 ports so I plugged the phone via a 2.0 usb hub.
MSM tool is installed into a Windows 10 virtual machine.
I didn't find any information about this specific Sahara error message.