Content Map Issue

[godind]

Has anyone seen this problem?

An unhandled exception occurred and the process was terminated.

Exception: System.ArgumentNullException

Message: Value cannot be null.
Parameter name: source

StackTrace: at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable1 source) at Adxstudio.Xrm.Cms.ContentMapProvider.RetrieveIntersectEntities(CrmDbContext context, ContentMap map, EntityReference target, Relationship relationship, IEnumerable1 relatedEntities) in D:\a\3\s\Framework\Adxstudio.Xrm\Cms\ContentMapProvider.cs:line 504
at Adxstudio.Xrm.Cms.ContentMapProvider.<>c__DisplayClass40_0.b__0() in D:\a\3\s\Framework\Adxstudio.Xrm\Cms\ContentMapProvider.cs:line 424
at Adxstudio.Xrm.Cms.ContentMap.<>c__DisplayClass13_01.<Using>b__0() in D:\a\3\s\Framework\Adxstudio.Xrm\Cms\ContentMap.cs:line 106 at Adxstudio.Xrm.Cms.ContentMap.Using(ContentMapLockType lockType, Action action, String memberName, String sourceFilePath, Int32 sourceLineNumber) in D:\a\3\s\Framework\Adxstudio.Xrm\Cms\ContentMap.cs:line 147 at Adxstudio.Xrm.Cms.ContentMap.Using[T](ContentMapLockType lockType, Func1 action, String memberName, String sourceFilePath, Int32 sourceLineNumber) in D:\a\3\s\Framework\Adxstudio.Xrm\Cms\ContentMap.cs:line 107
at Adxstudio.Xrm.Cms.ContentMapProvider.Associate(CrmDbContext context, ContentMap map, EntityReference target, Relationship relationship, EntityReferenceCollection relatedEntities) in D:\a\3\s\Framework\Adxstudio.Xrm\Cms\ContentMapProvider.cs:line 424
at Adxstudio.Xrm.Cms.ContentMapProvider.Associate(ContentMap map, EntityReference target, Relationship relationship, EntityReferenceCollection relatedEntities) in D:\a\3\s\Framework\Adxstudio.Xrm\Cms\ContentMapProvider.cs:line 404
at Adxstudio.Xrm.Services.ContentMapOrganizationServiceCache.Associate(EntityReference target, Relationship relationship, EntityReferenceCollection relatedEntities) in D:\a\3\s\Framework\Adxstudio.Xrm\Services\ContentMapOrganizationServiceCache.cs:line 241
at Adxstudio.Xrm.Services.ContentMapOrganizationServiceCache.Remove(OrganizationServiceCachePluginMessage message) in D:\a\3\s\Framework\Adxstudio.Xrm\Services\ContentMapOrganizationServiceCache.cs:line 139
at Adxstudio.Xrm.Services.PortalBusOrganizationServiceCache.RemoveLocal(OrganizationServiceCachePluginMessage message) in D:\a\3\s\Framework\Adxstudio.Xrm\Services\PortalBusOrganizationServiceCache.cs:line 178
at Adxstudio.Xrm.Services.PortalBusOrganizationServiceCache.Remove(OrganizationServiceCachePluginMessage message) in D:\a\3\s\Framework\Adxstudio.Xrm\Services\PortalBusOrganizationServiceCache.cs:line 163
at Adxstudio.Xrm.Caching.CacheInvalidation.InvalidateCache(OrganizationServiceCachePluginMessage message) in D:\a\3\s\Framework\Adxstudio.Xrm\Caching\CacheInvalidation.cs:line 48
at Adxstudio.Xrm.Web.Handlers.WebNotificationHandler.ProcessNotification(CancellationToken cancellationToken, PluginMessageRequest request) in D:\a\3\s\Framework\Adxstudio.Xrm\Web\Handlers\WebNotificationHandler.cs:line 177
at Adxstudio.Xrm.Web.Handlers.WebNotificationHandler.<>c__DisplayClass2_0.b__0(CancellationToken cancellationToken) in D:\a\3\s\Framework\Adxstudio.Xrm\Web\Handlers\WebNotificationHandler.cs:line 98
at System.Web.Hosting.HostingEnvironment.<>c__DisplayClass94_0.b__0(CancellationToken ct)