You ran into issues with your zone:
12/01 12:10:13 Trace: [System Output] [Inactive] [STOPPED @ 0:00]
12/01 12:10:13 Trace: [storage] [directory] initial scan of /Volumes/Seagate Backup Plus Drive/LOSSLESS took: 901 ms
12/01 12:10:13 Trace: [BossDAC] [raatclient] RAAT Session initialized in 272ms
12/01 12:10:13 Trace: [BossDAC] [raatclient] SENT [2]{"request":"info"}
12/01 12:10:13 Trace: [BossDAC] [raatclient] SENT [3]{"request":"set_client_type","client_type":"Roon"}
12/01 12:10:13 Trace: [BossDAC] [raatclient] GOT [2] {"source_selection":{"info":[],"is_supported":false},"status":"Success","flags":{"has_write_chmap":true},"platform":{"os":"linux","uname":{"version":"#1 SMP PREEMPT Mon Nov 1 14:11:29 CET 2021","release":"5.10.76-1-SPCKFSH-v7l+","nodename":"ropieee","sysname":"Linux","machine":"armv7l"}},"volume":{"info":{"config":{"type":"alsa","device":"hw:CARD=BossDAC,DEV=0"}},"is_supported":true},"transport":{"info":[],"is_supported":false},"output":{"supported_formats":"96000/32/1|2,384000/32/1|2,48000/32/1|2,88200/24/1|2,44100/32/1|2,48000/24/1|2,88200/16/1|2,192000/16/1|2,48000/16/1|2,192000/24/1|2,44100/24/1|2,176400/24/1|2,96000/24/1|2,352800/24/1|2,192000/32/1|2,88200/32/1|2,352800/16/1|2,384000/24/1|2,176400/32/1|2,352800/32/1|2,384000/16/1|2,96000/16/1|2,44100/16/1|2,176400/16/1|2","info":{"config":{"name":"BossDAC","dsd_mode":"none","device":"hw:CARD=BossDAC,DEV=0","type":"alsa"},"alsa_device":{"name":"BossDAC","id":"BossDAC","mixername":"","longname":"BossDAC","driver":"BossDAC","components":"BossDAC"}}},"info":{"unique_id":"9ac44600-c9c3-e494-66b4-e1134f2d822b"}}
12/01 12:10:13 Trace: [BossDAC] [raatclient] GOT [3] {"status":"Success"}
12/01 12:10:13 Trace: [zone System Output] Loaded Queue=63 Tracks Swim=Inactive AutoSwim=True Loop=Disabled Shuffle=False
12/01 12:10:13 Debug: [ByteBuffer] large alloc of 16384k
12/01 12:10:13 Trace: [System Output] [Inactive] [PAUSED @ 0:33/4:54] A Kaleidoscope Of Mathematics - James Horner
12/01 12:10:13 Trace: [raatserver] [BossDAC] connected
12/01 12:10:13 Info: [transport] creating endpoint for raat device 9ac44600-c9c3-e494-66b4-e1134f2d822b
12/01 12:10:13 Trace: [BossDAC] [raatclient] SENT [4]{"request":"subscribe_transport"}
12/01 12:10:13 Debug: AudioDeviceMunge.GetManufacturer(AudioDeviceType.Local, "", "BossDAC", "", "") => "Allo";
12/01 12:10:13 Debug: AudioDeviceMunge.GetModel(AudioDeviceType.Local, "", "BossDAC", "", "") => "Boss DAC";
12/01 12:10:13 Debug: AudioDeviceMunge.GetManufacturer(AudioDeviceType.Local, "", "BossDAC", "BossDAC", "") => "Allo";
12/01 12:10:13 Debug: AudioDeviceMunge.GetModel(AudioDeviceType.Local, "", "BossDAC", "BossDAC", "") => "Boss DAC";
12/01 12:10:13 Trace: [BossDAC] [raatclient] SENT [5]{"request":"subscribe_controls","controller_id":"24f4cfe3-c36d-4bef-8bde-c5b286070823"}
12/01 12:10:13 Trace: [dspengine] created new dsp config {"version":3,"items":[{"type":"■■2b","enabled":false},{"type":"parametric_equalizer","enabled":false},{"type":"audeze_presets","enabled":false}]}
12/01 12:10:13 Trace: [transport/audeze] picking preset lowlatency
12/01 12:10:13 Trace: [transport/audeze] picked null preset!
12/01 12:10:13 Trace: [BossDAC] [raatclient] GOT [5] {"controls":{"volume":{"max":100.0,"type":"number","min":0.0,"mute":false,"info":{"config":{"type":"alsa","device":"hw:CARD=BossDAC,DEV=0"}},"step":1.0,"value":100}},"status":"Success","action":"Changed"}
12/01 12:10:13 Trace: [zone Lossless_Emporium] Loading
12/01 12:10:13 Trace: [zone Lossless_Emporium] Suspend
12/01 12:10:13 Info: [zone Lossless_Emporium] Canceling Pending Sleep
12/01 12:10:13 Trace: [Lossless_Emporium] [zoneplayer/raat] Endpoint BossDAC Initial State: Idle
12/01 12:10:13 Info: [transport] created zone Lossless_Emporium
12/01 12:10:13 Info: [transport] with endpoint BossDAC (23:1:9ac44600-c9c3-e494-66b4-e1134f2d822b) [IsAvailable=True]
12/01 12:10:13 Trace: [Lossless_Emporium] [Inactive] [STOPPED @ 0:00]
12/01 12:10:13 Trace: [platformnowplaying/mac] MPNowPlayingInfoCenter: Connect
12/01 12:10:13 Trace: [zone Lossless_Emporium] Loaded Queue=5142 Tracks Swim=Inactive AutoSwim=False Loop=Disabled Shuffle=False
12/01 12:10:13 Trace: [Lossless_Emporium] [Inactive] [PAUSED @ 0:29/3:18] She's A Pass - Paul Leonard-Morgan
12/01 12:10:13 Trace: [platformnowplaying/mac] MPNowPlayingInfoCenter: Connect
12/01 12:10:14 Critical: while dispatching events: System.NullReferenceException: Object reference not set to an instance of an object
at Sooloos.Client.Models.Zones.UpdatePlatformNowPlaying (Sooloos.Broker.Api.Zone zone) [0x000b4] in <7336af04856c4fe4b1eaf012b0b1860f>:0
at Sooloos.Client.Models.Zones.ev_zone_changed (Sooloos.Broker.Api.Zone zone) [0x0000a] in <7336af04856c4fe4b1eaf012b0b1860f>:0
at Sooloos.Broker.Transport.Zone.<OnChanged>b__276_0 (System.Action`1[T] h) [0x00000] in <25eab4ba5dfd423c843f876c5b7e89b8>:0
at Sooloos.Concurrency.EventHandler`1[HANDLER].Dispatch (System.Object o_cb_fireone) [0x00000] in <0e2b7ea0c213487aab56ac1ecc1666ee>:0
at Sooloos.Concurrency.EventHandlers.Dispatch (System.Collections.Generic.List`1[T] evs) [0x00031] in <0e2b7ea0c213487aab56ac1ecc1666ee>:0
at Sooloos.Concurrency.SharedState`1[THREAD].FlushEvents () [0x00029] in <0e2b7ea0c213487aab56ac1ecc1666ee>:0
12/01 12:10:14 Info:
Local Time: 12/01/2021 12:10:14 +00:00
Device Serial Number: CB8FA783-A51F-46A1-BAC4-E9800ECA4289
User Id: 450e6c09-53ab-4fd4-ad06-93eda8d32f66
Roon Version: 1.8 (build 831) stable
OS Version: Mac OS X 10.15.7
Hardware Version: MacBookPro14,3
Mono Version: 6.10.0.106 (2019-12/77769615db1)
Application Domain: Roon.exe
Assembly Codebase: file:///Applications/Roon.app/Contents/MonoBundle/Roon.exe
Assembly Full Name: Roon, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null
CPU0 Description: Intel(R) Core(TM) i7-7920HQ CPU @ 3.10GHz (64-bit)
CPU0 Num Cores: Physical: 4 Logical: 8
Exception Source: Roon.Client.BrooModels
Exception Type: System.NullReferenceException
Exception Target Site: Zones.UpdatePlatformNowPlaying
Exception Message: Object reference not set to an instance of an object
Exception Data: none
--[ Stack Trace ]------------
Sooloos.Client.Models.Zones.UpdatePlatformNowPlaying(Zone zone)
Roon.Client.BrooModels.dll, IL 180, N 786
Sooloos.Client.Models.Zones.ev_zone_changed(Zone zone)
Roon.Client.BrooModels.dll, IL 10, N 82
Sooloos.Broker.Transport.Zone.<OnChanged>b__276_0(Action`1 h)
Roon.Broker.Core.dll, IL 0, N 62
Sooloos.Concurrency.EventHandler`1.Dispatch(Object o_cb_fireone)
Roon.Broker.Concurrency.dll, IL 0, N 125
Sooloos.Concurrency.EventHandlers.Dispatch(List`1 evs)
Roon.Broker.Concurrency.dll, IL 49, N 349
Sooloos.Concurrency.SharedState`1.FlushEvents()
Roon.Broker.Concurrency.dll, IL 82, N 738
Sooloos.Broker.State.BeginAccess(List`1 out_mutated_objects)
Roon.Broker.Core.dll, IL 57, N 330
Sooloos.Broker.State.EndAccess()
Roon.Broker.Core.dll, IL 49, N 346
Sooloos.Broker.ApiRoot.EndAccess()
Roon.Broker.Core.dll, IL 0, N 66
Broo.Engine.DeviceTarget.GuiMainLoop()
BrooEngine.dll, IL 435, N 1302
Broo.Engine.Engine.GuiMainLoop()
BrooEngine.dll, IL 0, N 46
Sooloos.Application.Main(String[] argv)
RoonLib.dll, IL 1305, N 7786
RoonMac.Application.Main(String[] args)
Roon.exe, IL 648, N 3162
12/01 12:10:14 Error:
Local Time: 12/01/2021 12:10:14 +00:00
Device Serial Number: CB8FA783-A51F-46A1-BAC4-E9800ECA4289
User Id: 450e6c09-53ab-4fd4-ad06-93eda8d32f66
Roon Version: 1.8 (build 831) stable
OS Version: Mac OS X 10.15.7
Hardware Version: MacBookPro14,3
Mono Version: 6.10.0.106 (2019-12/77769615db1)
Application Domain: Roon.exe
Assembly Codebase: file:///Applications/Roon.app/Contents/MonoBundle/Roon.exe
Assembly Full Name: Roon, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null
CPU0 Description: Intel(R) Core(TM) i7-7920HQ CPU @ 3.10GHz (64-bit)
CPU0 Num Cores: Physical: 4 Logical: 8
Exception Source: Roon.Client.BrooModels
Exception Type: System.NullReferenceException
Exception Target Site: Zones.UpdatePlatformNowPlaying
Exception Message: Object reference not set to an instance of an object
Exception Data: none
--[ Stack Trace ]------------
Sooloos.Client.Models.Zones.UpdatePlatformNowPlaying(Zone zone)
Roon.Client.BrooModels.dll, IL 180, N 786
Sooloos.Client.Models.Zones.ev_zone_changed(Zone zone)
Roon.Client.BrooModels.dll, IL 10, N 82
Sooloos.Broker.Transport.Zone.<OnChanged>b__276_0(Action`1 h)
Roon.Broker.Core.dll, IL 0, N 62
Sooloos.Concurrency.EventHandler`1.Dispatch(Object o_cb_fireone)
Roon.Broker.Concurrency.dll, IL 0, N 125
Sooloos.Concurrency.EventHandlers.Dispatch(List`1 evs)
Roon.Broker.Concurrency.dll, IL 49, N 349
Sooloos.Concurrency.SharedState`1.FlushEvents()
Roon.Broker.Concurrency.dll, IL 82, N 738
Sooloos.Broker.State.BeginAccess(List`1 out_mutated_objects)
Roon.Broker.Core.dll, IL 57, N 330
Sooloos.Broker.State.EndAccess()
Roon.Broker.Core.dll, IL 49, N 346
Sooloos.Broker.ApiRoot.EndAccess()
Roon.Broker.Core.dll, IL 0, N 66
Broo.Engine.DeviceTarget.GuiMainLoop()
BrooEngine.dll, IL 435, N 1302
Broo.Engine.Engine.GuiMainLoop()
BrooEngine.dll, IL 0, N 46
Sooloos.Application.Main(String[] argv)
RoonLib.dll, IL 1305, N 7786
RoonMac.Application.Main(String[] args)
Roon.exe, IL 648, N 3162
That zone is maybe unstable on your network?
That also points at that specific zone.
Can’t tell you more from the error in the log. Maybe official @support is able to read more out of it.