Adding Disks to an existing TRAID pool TOS 5.1.34

[YoYoYo]

After all the procedures, and after i added all the drives to the storage pool, and the capacity to the volume (4x4tb), i shut down the nas (using the shut down button in the UI) to position it in the correct place. When i turned it on again, now it is stuck on "Loading ... please wait"
Am i facing this issue ? viewtopic.php?f=81&t=2407

I did the OS installation from scratch to get the 8gb partition and to have the cleanest starting point possible but seems that anyway something went wrong...
Shall i wait 2 days to see if i lost the data ? Are already 9 hours that it is showing the white page with Loading please wait message.

[YoYoYo]

It started but i cannot edit the volume pool to add the last disk.
Any tips ??

[YoYoYo]

I did a restart of the system and now seems ok......................