Hi, guys

I have strange umbraco cloud issue. I can't open any node containing Grid. Could anyone help me?

Umbraco version 8.5.5

System.NullReferenceException: Object reference not set to an instance of an object.

at Umbraco.Web.PropertyEditors.GridPropertyEditor.GridPropertyValueEditor.DeserializeGridValue(String rawJson, IEnumerable1& richTextValues) at Umbraco.Web.PropertyEditors.GridPropertyEditor.GridPropertyValueEditor.ToEditor(Property property, IDataTypeService dataTypeService, String culture, String segment) at Umbraco.Web.PropertyEditors.NestedContentPropertyEditor.NestedContentPropertyValueEditor.ToEditor(Property property, IDataTypeService dataTypeService, String culture, String segment) at Umbraco.Web.Models.Mapping.ContentPropertyBasicMapper1.Map(Property property, TDestination dest, MapperContext context) at Umbraco.Web.Models.Mapping.ContentPropertyDisplayMapper.Map(Property originalProp, ContentPropertyDisplay dest, MapperContext context) at Umbraco.Web.Models.Mapping.ContentPropertyMapDefinition.Map(Property source, ContentPropertyDisplay target, MapperContext context) at Umbraco.Core.Mapping.UmbracoMapper.<>cDisplayClass802.<Define>b__1(Object source, Object target, MapperContext context) at Umbraco.Core.Mapping.UmbracoMapper.Map[TTarget](Object source, Type sourceType, MapperContext context) at Umbraco.Core.Mapping.UmbracoMapper.Map[TSource,TTarget](TSource source, MapperContext context) at Umbraco.Core.Mapping.MapperContext.Map[TSource,TTarget](TSource source) at System.Linq.Enumerable.WhereSelectEnumerableIterator2.MoveNext() at System.Collections.Generic.List1..ctor(IEnumerable1 collection) at System.Linq.Enumerable.ToList[TSource](IEnumerable1 source) at Umbraco.Core.Mapping.MapperContext.MapEnumerable[TSourceElement,TTargetElement](IEnumerable1 source) at Umbraco.Web.Models.Mapping.TabsAndPropertiesMapper.MapProperties(IContentBase content, List1 properties, MapperContext context) at Umbraco.Web.Models.Mapping.TabsAndPropertiesMapper1.Map(TSource source, MapperContext context) at Umbraco.Web.Models.Mapping.ContentMapDefinition.Map(IContent source, ContentVariantDisplay target, MapperContext context) at Umbraco.Core.Mapping.UmbracoMapper.<>cDisplayClass802.<Define>b__1(Object source, Object target, MapperContext context) at Umbraco.Core.Mapping.UmbracoMapper.Map[TTarget](Object source, Type sourceType, MapperContext context) at Umbraco.Core.Mapping.UmbracoMapper.Map[TTarget](Object source, MapperContext context) at Umbraco.Web.Models.Mapping.ContentVariantMapper.Map(IContent source, MapperContext context) at Umbraco.Web.Models.Mapping.ContentMapDefinition.Map(IContent source, ContentItemDisplay target, MapperContext context) at Umbraco.Core.Mapping.UmbracoMapper.<>c__DisplayClass8_02.