This randomly started happening.

Please attach the crash log file as described here: https://atvo.appgineering.com/Forum/Thread/7

Error: 5/5/2020 1:28:56 AM (UTC)
ATVO version: 1.29.7.0
Themes SDK version: 1.19.0.0
Theme version: 1.0.0.0

Unhandled exception
YamlDotNet.Core.SemanticErrorException: (Line: 792, Col: 17, Idx: 17804) - (Line: 792, Col: 18, Idx: 17805): While parsing a node, did not find expected node content.
at YamlDotNet.Core.Parser.ParseNode(Boolean isBlock, Boolean isIndentlessSequence)
at YamlDotNet.Core.Parser.MoveNext()
at YamlDotNet.Core.ParserExtensions.Allow[T](IParser parser)
at YamlDotNet.Core.ParserExtensions.Expect[T](IParser parser)
at YamlDotNet.RepresentationModel.YamlScalarNode.Load(IParser parser, DocumentLoadingState state)
at YamlDotNet.RepresentationModel.YamlNode.ParseNode(IParser parser, DocumentLoadingState state)
at YamlDotNet.RepresentationModel.YamlMappingNode.Load(IParser parser, DocumentLoadingState state)
at YamlDotNet.RepresentationModel.YamlNode.ParseNode(IParser parser, DocumentLoadingState state)
at YamlDotNet.RepresentationModel.YamlSequenceNode.Load(IParser parser, DocumentLoadingState state)
at YamlDotNet.RepresentationModel.YamlNode.ParseNode(IParser parser, DocumentLoadingState state)
at YamlDotNet.RepresentationModel.YamlMappingNode.Load(IParser parser, DocumentLoadingState state)
at YamlDotNet.RepresentationModel.YamlNode.ParseNode(IParser parser, DocumentLoadingState state)
at YamlDotNet.RepresentationModel.YamlMappingNode.Load(IParser parser, DocumentLoadingState state)
at YamlDotNet.RepresentationModel.YamlNode.ParseNode(IParser parser, DocumentLoadingState state)
at YamlDotNet.RepresentationModel.YamlDocument..ctor(IParser parser)
at YamlDotNet.RepresentationModel.YamlStream.Load(IParser parser)
at ATVO.Data.Updater.DataUpdater.ParseYaml(String yaml) in D:\Users\Nick\Documents\Programming\ATVO\Appgineer.in-TV-Overlay-for-iRacing\ATVO.Data\Updater\DataUpdater.cs:line 191
at ATVO.Data.Updater.DataUpdater.Update(iRacingSDK sdk, Simulation sim) in D:\Users\Nick\Documents\Programming\ATVO\Appgineer.in-TV-Overlay-for-iRacing\ATVO.Data\Updater\DataUpdater.cs:line 103
at ATVO.Data.Updater.DataUpdater.UpdateData(iRacingSDK& sdk, Simulation sim) in D:\Users\Nick\Documents\Programming\ATVO\Appgineer.in-TV-Overlay-for-iRacing\ATVO.Data\Updater\DataUpdater.cs:line 84
at ATVO.Data.Simulation.UpdateData() in D:\Users\Nick\Documents\Programming\ATVO\Appgineer.in-TV-Overlay-for-iRacing\ATVO.Data\Simulation.cs:line 271

Is that the whole logfile? There should be a session info section below this which tells us what the issue was. Without that part we can only guess. Can you post the full logfile with the method I posted before?