Duplicati falls breaking by itself

when I do a database repair, I get a message that the server itself has just disconnected.

I noticed a lot of errors in your program is it bad you understand ??
I don’t know how to use your program, I’m very worried that I’ll lose all my data on some day

Apr 22 2019, 14:59: Reporting error gave error
System.ObjectDisposedException: Writing to a closed TextWriter is not possible.
    in System.IO .__ Error.WriterClosed ()
    in System.IO.StreamWriter.Flush (Boolean flushStream, Boolean flushEncoder)
    in Duplicati.Server.WebServer.RESTHandler.DoProcess (RequestInfo info, String method, String module, String key)

more logs

Apr 22 2019, 14:59: Request for http: // localhost: 8300 / api / v1 / backup / 12 / deletedb gave error
System.IO.IOException: The process cannot access the file "C: \ Users \ admin \ AppData \ Local \ Duplicati \ zzzbackup.sqlite" because this file is being used by another process.
    in System.IO .__ Error.WinIOError (Int32 errorCode, String maybeFullPath)
    in System.IO.File.InternalDelete (String path, Boolean checkHost)
    in Duplicati.Server.WebServer.RESTMethods.Backup.POST (String key, RequestInfo info)
    in Duplicati.Server.WebServer.RESTHandler.DoProcess (RequestInfo info, String method, String module, String key)

I had a desire to donate but changed his mind.
The program does not work well, it does not save from the loss of my personal data
:unamused::unamused::unamused:

P.S.
I want to use open source software, but I see errors and a lot of problems with such utilities