2.4.8 Single node, which Daniel has encountered such problems?
Ladies and gentlemen, who has encountered such problems?

Error in opening file
 QueryFailure flag was assertion src/mongo/db/database.cpp:300 (response was { "$err" : "assertion src/mongo/db/database.cpp:300" }).
 Type: MongoDB.Driver.MongoQueryException
 Stack: at mongodb.driver.internal.mongooreplymessage`1.readfrom
 In mongodb.driver.internal.mongoconnection.receivemessage [tdocument] (bsonbinaryreadersettingssreadersettings, ibsonserializationserializationoptions)
 At MongoDB.driver.MongoCursorEnumerator`1.getReply (MongoConnection, MongoEquisetMessage)
 At mongodb.driver.mongoocursorenumerator`1.getfirst ()
 At mongodb.driver.mongoocursorenumerator`1.movenext ()
 First storedefault [tsource] (ienumerable`1source)
 At mongodb.driver.gridfs.mongodsfileinfo.refresh ()
 At mongodb.driver.gridfs.mongodsfileinfo.get _ exists ()
 In mongodb.driver.gridfs.mongogridfstream.vector (mongogridfsfileinfo, filemodemode, fileaccessaccess)
 At mongodb.driver.gridfs.mongodsfileinfo.openread ()
 In mangoui.mgridsys.savefile (strindbb, strinns, stringffilename, stringpathonlocaldisk)
 At mangoui.comgrids.kopen _ click (objectsender, eventargse)
 =======================
 QueryFailure flag was expected to be write locked for EmrFiles (response was { "$err" : "expected to be write locked for EmrFiles", "code" : 16105 }).
 Type: MongoDB.Driver.MongoQueryException

How to solve it?