Jellyfin won't play files after reboot

[hntxz]

NAME  FSTYPE    SIZE MOUNTPOINT        LABEL
loop0  squashfs  40.4M /snap/snapd/20671
loop1  squashfs  63.9M /snap/core20/2105
loop2  squashfs  63.4M /snap/core20/1974
loop3  squashfs  53.3M /snap/snapd/19457
loop4  squashfs 111.9M /snap/lxd/24322
loop5  squashfs 114.4M /snap/lxd/26741
sda            465.8G
├─sda1 vfat        1G /boot/efi
└─sda2 ext4    464.7G /
sdb            931.5G
└─sdb1 ext4    931.5G /boot

Can i just nuke this SDB and start again with the jellyfin installation?