RAID 10 single drive failure, array not visible, MSI PRO X670

The system was running Windows Server 2019 for about a year on a four-drive RAID 10 array using an MSI PRO X670 motherboard. After shutting it down for the weekend, it wouldn’t boot into Windows. It did load into the Windows troubleshooter, but no partitions from the RAID array were visible.

In the BIOS, one of the drives shows as “removed,” while the other three are online. The array status is “critical,” but since three drives are active, it should still be operational in a degraded state.

I booted from the Windows Server DVD, went into the installation menu, and loaded the AMD RAID drivers from the same USB drive used during the initial setup. Still, the installer doesn’t detect the array. No drives appear, so I couldn’t proceed.

Looking for any advice on how to access the array long enough to recover the data. Any method or workaround would help.