I also have this error.

2023-05-23 18:22:57.909 - Thread: 1 -> Build Info error/exception: System.NotSupportedException: The given path's format is not supported.
at System.Security.Permissions.FileIOPermission.EmulateFileIOPermissionChecks(String fullPath)
at System.Security.Permissions.FileIOPermission.QuickDemand(FileIOPermissionAccess access, String fullPath, Boolean checkForDuplicates, Boolean needFullPath)
at Sandbox.ModAPI.MyAPIUtilities.VRage.Game.ModAPI.IMyUtilities.FileExistsInModLocation(String file, ModItem modItem)
at Digi.BuildInfo.Features.ModderHelp.CheckErrors(HashSet`1 localMods)
at Digi.BuildInfo.Features.ModderHelp..ctor(BuildInfoMod main)
at Digi.BuildInfo.BuildInfoMod..ctor(BuildInfo_GameSession session)
at Digi.ComponentLib.BuildInfo_GameSession.LoadMod()
at Digi.ComponentLib.BuildInfo_GameSession.LoadData()
2023-05-23 18:22:57.912 - Thread: 1 -> ERROR: Loading screen failed
2023-05-23 18:22:57.915 - Thread: 1 -> Exception occurred: System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.Exception: Error in mod loading, see above exceptions.
at Digi.ComponentLib.BuildInfo_GameSession.LoadData()
at Sandbox.Game.World.MySession.LoadComponent(MySessionComponentBase component)
at Sandbox.Game.World.MySession.LoadDataComponents()
at Sandbox.Game.World.MySession.PrepareBaseSession(MyObjectBuilder_Checkpoint checkpoint, MyObjectBuilder_Sector sector)
at Sandbox.Game.World.MySession.LoadMultiplayer(MyObjectBuilder_World world, MyMultiplayerBase multiplayerSession)
--- End of inner exception stack trace ---
at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at SeamlessClientPlugin.SeamlessTransfer.Patches.<>c__DisplayClass87_0.<LoadMultiplayerSession>b__2()
at System.DelegateExtensions.InvokeIfNotNull(Action handler)
at Sandbox.Game.Gui.MyGuiScreenLoading.RunLoad()
2023-05-23 18:22:57.915 - Thread: 1 -> InnerException:
2023-05-23 18:22:57.915 - Thread: 1 -> Exception occurred: System.Exception: Error in mod loading, see above exceptions.
at Digi.ComponentLib.BuildInfo_GameSession.LoadData()
at Sandbox.Game.World.MySession.LoadComponent(MySessionComponentBase component)
at Sandbox.Game.World.MySession.LoadDataComponents()
at Sandbox.Game.World.MySession.PrepareBaseSession(MyObjectBuilder_Checkpoint checkpoint, MyObjectBuilder_Sector sector)
at Sandbox.Game.World.MySession.LoadMultiplayer(MyObjectBuilder_World world, MyMultiplayerBase multiplayerSession)

Additional information: This also happens when using the main branch.

Thanks, I'll have to look deeper into this one, for now I've updated to disable that part of the code :}

Thank you!