Can't create output file

We have a new site where someone supplied us a server running Ubuntu Server edition, and we have installed and setup NX but we are having issues with recording.

In Storage management, we can see the 3 x 20TB drives and they are all enabled, but recording is not working. The history bar at the bottom is flashing on and off, and the red recording circle3 next to the camera is going on and off. The logs from the webpage show this constantly:

I am assuming this is a permissions issue?

2025-10-15 13:38:00.812 366462 WARNING nx::vms::server::ServerStorageStreamRecorder(0x753d030461c0): prepareToStart: Can't create output file '/srv/nxwitness/disk2/HD Witness Media/4ed86573-3ca0-1dff-0daf-87ef205119f4/low_quality/uuid_e0085645-9199-f35e-3b3c-d70f43559199/2025/10/15/13/1760495850791.mkv'
2025-10-15 13:38:00.812 366462 WARNING nx::vms::server::ServerStorageStreamRecorder(0x753d03045d20): saveData: prepareToStart() failed
2025-10-15 13:38:00.816 366467 WARNING nx::vms::server::ServerStorageStreamRecorder(0x753d0300daa0): prepareToStart: Can't create output file '/srv/nxwitness/disk0/HD Witness Media/4ed86573-3ca0-1dff-0daf-87ef205119f4/hi_quality/uuid_8aff9602-8ea0-6174-7720-63ac4f5c8ea0/2025/10/15/13/1760495822349.mkv'
2025-10-15 13:38:00.816 366467 WARNING nx::vms::server::ServerStorageStreamRecorder(0x753d0300d600): saveData: prepareToStart() failed
2025-10-15 13:38:00.819 366406 WARNING nx::vms::server::ServerStorageStreamRecorder(0x753d02f89910): TOO MANY SIMILAR MESSAGES: prepareToStart: Can't create output file '/srv/nxwitness/disk1/HD Witness Media/4ed86573-3ca0-1dff-0daf-87ef205119f4/low_quality/uuid_1d62acfd-2542-4cfc-b10e-feb31d337c61/2025/10/15/13/1760495843399.mkv'
2025-10-15 13:38:00.819 366406 WARNING nx::vms::server::ServerStorageStreamRecorder(0x753d02f89470): TOO MANY SIMILAR MESSAGES: saveData: prepareToStart() failed