You have NVME drive10. Solid State disks are not recommended in the array. They cannot be trimmed, they can't be written any faster than parity, and there is some uncertainty whether some implementations will invalidate parity.
You have problems communicating with multiple disks, parity and disk1. Are these on a controller card? If so, reseat controller.
Check all connections, power and SATA, both ends. Be sure to check any power splitters you may have.
Also, your NVME is not reporting SMART. Not sure what to do about that, but I can't tell anything about it from the diagnostics. How large is it? You should probably consider using it for cache instead of the small 120GB cache you currently have.
And, your system share has files on the array. You need to get them moved to cache. They will keep array disks including parity spinning and will not perform as well on the array.