Internal server error 500: Can't mount my hard disk to openmediavault storage

Hii there!

I am beginner in OMV

I installed my OMV 6 on my PC for using it as a NAS in my home.

I installed it on a harddrive 250gb(/dev/sda1)and it is working fine.

Now i decided to add a hard disk and I added a 1tb surveillance hard disk.(/dev/sdb1)

It is detecting in storage but when I try to mount I get internal server error 500 shown in image below

Can anyone help me to figure out this issue?

Th