C# NLog TemplateParserException，预期为'；{'；但却以格式找到了'；\'？

我在一个项目中使用NLog（4.7.2），其中NLog日志文件中出现以下异常：

2020-07-03 15:41:52.5324调试监视路径'C:\DEVSTUFF\MyApp\Produkter\MyAppUtveckling\Solution\MyApp.Client.Main\bin\Debug'过滤器'NLog.config'用于更改。
2020-07-03 15:41:52.5324调试---NLog配置转储---
2020-07-03 15:41:52.5324调试目标：
2020-07-03 15:41:52.5513调试日志服务目标[日志服务]
2020-07-03 15:41:52.5513调试日志消息事件目标[通信日志窗口]
2020-07-03 15:41:52.5633调试规则：
2020-07-03 15:41:52.5633调试---NLog配置转储结束---
2020-07-03 15:41:52.5853跟踪查找可访问对象：
2020-07-03 15:41:52.5942跟踪扫描LogToService目标“LogToService目标[LogToService]”
2020-07-03 15:41:52.5942跟踪扫描属性布局“${longdate}|${level:uppercase=true}}|${logger}|${message}”NLog.Layouts
2020-07-03 15:41:52.5942跟踪扫描SimpleLayout'${longdate}}${level:uppercase=true}}}}}${logger}}}}${message}
2020-07-03 15:41:52.6132跟踪扫描属性渲染器的System.Collections.ObjectModel.ReadOnlyCollection`1[NLog.LayoutRenders.LayoutRenderer]'System.Collections.ObjectModel
2020-07-03 15:41:52.6132跟踪扫描LongDateLayoutRenderer“布局渲染器：${longdate}”
2020-07-03 15:41:52.6271跟踪扫描文字布局输出渲染器“布局渲染器：${literal}”
2020-07-03 15:41:52.6271跟踪扫描UppercaseLayoutRendererWrapper'布局渲染器：${uppercase}'
2020-07-03 15:41:52.6271跟踪扫描属性内部“SimpleLayout=布局渲染器：${level}”NLog.Layouts
2020-07-03 15:41:52.6561跟踪扫描SimpleLayout'SimpleLayout=布局渲染器：${level}
2020-07-03 15:41:52.6561跟踪扫描属性渲染器的System.Collections.ObjectModel.ReadOnlyCollection`1[NLog.LayoutRenders.LayoutRenderer]'System.Collections.ObjectModel
2020-07-03 15:41:52.6561跟踪扫描级别LayoutRenderer“布局渲染器：${level}”
2020-07-03 15:41:52.6730跟踪扫描文字布局输出渲染器“布局渲染器：${literal}”
2020-07-03 15:41:52.6730跟踪扫描LoggerNameLayoutRenderer“布局渲染器：${logger}”
2020-07-03 15:41:52.6910跟踪扫描文字布局输出渲染器“布局渲染器：${literal}”
2020-07-03 15:41:52.6910跟踪扫描消息布局渲染器“布局渲染器：${message}”
2020-07-03 15:41:52.7039跟踪扫描LogMessageEventTarget“LogMessageEvent Target[communicationLogWindow]”
2020-07-03 15:41:52.7039跟踪扫描属性布局“${longdate}|${level:uppercase=true}}|${logger}|${message}”NLog.Layouts
2020-07-03 15:41:52.7039跟踪扫描SimpleLayout'${longdate}}${level:uppercase=true}}}}}${logger}}}}${message}
2020-07-03 15:41:52.7219跟踪扫描属性渲染器的System.Collections.ObjectModel.ReadOnlyCollection`1[NLog.LayoutRenders.LayoutRenderer]'System.Collections.ObjectModel
2020-07-03 15:41:52.7219跟踪扫描LongDateLayoutRenderer“布局渲染器：${longdate}”
2020-07-03 15:41:52.7219跟踪扫描文字布局输出渲染器“布局渲染器：${literal}”
2020-07-03 15:41:52.7388跟踪扫描UppercaseLayoutRendererWrapper'布局渲染器：${uppercase}'
2020-07-03 15:41:52.7388跟踪扫描属性内部“SimpleLayout=布局渲染器：${level}”NLog.Layouts
2020-07-03 15:41:52.7498跟踪扫描SimpleLayout'SimpleLayout=布局渲染器：${level}'
2020-07-03 15:41:52.7498跟踪扫描属性渲染器System.Collections.ObjectModel.ReadOnlyCollection`1[NLog.LayoutRenders.LayoutRenderer]'System.Collections.ObjectModel
2020-07-03 15:41:52.7668跟踪扫描级别LayoutRenderer“布局渲染器：${level}”
2020-07-03 15:41:52.7668跟踪扫描文字布局输出渲染器“布局渲染器：${literal}”
2020-07-03 15:41:52.7817跟踪扫描LoggerNameLayoutRenderer“布局渲染器：${logger}”
2020-07-03 15:41:52.7817跟踪扫描文字布局输出渲染器“布局渲染器：${literal}”
2020-07-03 15:41:52.7817跟踪扫描消息布局渲染器“布局渲染器：${message}”
2020-07-03 15:41:52.8017信息找到22个配置项
2020-07-03 15:41:52.8127调试未使用的目标检查已开始…规则计数：0，目标计数：2
2020-07-03 15:41:52.8127警告检测到未使用的目标。将此目标的规则添加到配置中。目标名称：LogToService
2020-07-03 15:41:52.8296警告检测到未使用的目标。将此目标的规则添加到配置中。TargetName:communicationLogWindow
2020-07-03 15:41:52.8296调试未使用的目标检查已完成。总规则计数：0，总目标计数：2，未使用的目标计数：2
2020-07-03 15:41:52.8296跟踪初始化布局渲染器：${message}
2020-07-03 15:41:52.8476跟踪初始化布局渲染器：${literal}
2020-07-03 15:41:52.8476跟踪初始化布局渲染器：${logger}
2020-07-03 15:41:52.8595跟踪初始化布局渲染器：${literal}
2020-07-03 15:41:52.8595跟踪初始化布局渲染器：${level}
2020-07-03 15:41:52.8595跟踪初始化SimpleLayout=布局渲染器：${level}
2020-07-03 15:41:52.8805跟踪查找可访问对象：
2020-07-03 15:41:52.8805跟踪扫描SimpleLayout“SimpleLayout=布局渲染器：${level}”
2020-07-03 15:41:52.8924跟踪扫描属性渲染器System.Collections.ObjectModel.ReadOnlyCollection`1[NLog.LayoutRenders.LayoutRenderer]'System.Collections.ObjectModel
2020-07-03 15:41:52.8924跟踪扫描级别LayoutRenderer“布局渲染器：${level}”
2020-07-03 15:41:52.9074跟踪初始化布局渲染器：${uppercase}
2020-07-03 15:41:52.9074跟踪初始化布局渲染器：${literal}
2020-07-03 15:41:52.9074跟踪初始化布局渲染器：${longdate}
2020-07-03 15:41:52.9253跟踪初始化“${longdate}}${level:uppercase=true}}}|${logger}|${message}”
2020-07-03 15:41:52.9253跟踪查找可访问对象：
2020-07-03 15:41:52.9373跟踪扫描SimpleLayout'${lon
var logEvent = new LogEventInfo();
logEvent.Level = logData.LogLevel.ToLogLevel();
logEvent.Message = JsonConvert.SerializeObject(logData, Formatting.Indented);
logEvent.Properties.Add("logdata", logData);
// Skip this -> logEvent.Parameters = new object[1] { logData };
_genLogger.Log(logEvent);

var logEvent = new LogEventInfo();
logEvent.Level = logData.LogLevel.ToLogLevel();
logEvent.Message = "{0}";    // Blob formatting
logEvent.Properties.Add("logdata", logData);
logEvent.Parameters = new object[1] { JsonConvert.SerializeObject(logData, Formatting.Indented); };
_genLogger.Log(logEvent);

_genLogger.Log(logData.LogLevel.ToLogLevel(), "{@logdata}", logData);