Value cannot be null. Parameter name: path

Support
1

Hi there, I’m running a backup every day (hasn’t completed past 2 days) due to an error.

System.ArgumentNullException: Value cannot be null.
Parameter name: path
  at Duplicati.Library.Main.BackendManager.WaitForEmpty (Duplicati.Library.Main.Database.LocalDatabase db, System.Data.IDbTransaction transation) [0x00067] in <8f1de655bd1240739a78684d845cecc8>:0 
  at Duplicati.Library.Main.Operation.CompactHandler.DoDelete (Duplicati.Library.Main.Database.LocalDeleteDatabase db, Duplicati.Library.Main.BackendManager backend, System.Collections.Generic.IEnumerable`1[T] deleteableVolumes, System.Data.IDbTransaction& transaction) [0x00040] in <8f1de655bd1240739a78684d845cecc8>:0 
  at Duplicati.Library.Main.Operation.CompactHandler.DoCompact (Duplicati.Library.Main.Database.LocalDeleteDatabase db, System.Boolean hasVerifiedBackend, System.Data.IDbTransaction& transaction, Duplicati.Library.Main.BackendManager sharedBackend) [0x004a2] in <8f1de655bd1240739a78684d845cecc8>:0 
  at Duplicati.Library.Main.Operation.DeleteHandler.DoRun (Duplicati.Library.Main.Database.LocalDeleteDatabase db, System.Data.IDbTransaction& transaction, System.Boolean hasVerifiedBacked, System.Boolean forceCompact, Duplicati.Library.Main.BackendManager sharedManager) [0x00397] in <8f1de655bd1240739a78684d845cecc8>:0 
  at Duplicati.Library.Main.Operation.BackupHandler.CompactIfRequired (Duplicati.Library.Main.BackendManager backend, System.Int64 lastVolumeSize) [0x000a5] in <8f1de655bd1240739a78684d845cecc8>:0 
  at Duplicati.Library.Main.Operation.BackupHandler+<RunAsync>d__20.MoveNext () [0x00d9f] in <8f1de655bd1240739a78684d845cecc8>:0 
--- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in <8f2c484307284b51944a1a13a14c0266>:0 
  at CoCoL.ChannelExtensions.WaitForTaskOrThrow (System.Threading.Tasks.Task task) [0x00050] in <9a758ff4db6c48d6b3d4d0e5c2adf6d1>:0 
  at Duplicati.Library.Main.Operation.BackupHandler.Run (System.String[] sources, Duplicati.Library.Utility.IFilter filter, System.Threading.CancellationToken token) [0x00009] in <8f1de655bd1240739a78684d845cecc8>:0 
  at Duplicati.Library.Main.Controller+<>c__DisplayClass14_0.<Backup>b__0 (Duplicati.Library.Main.BackupResults result) [0x0004b] in <8f1de655bd1240739a78684d845cecc8>:0 
  at Duplicati.Library.Main.Controller.RunAction[T] (T result, System.String[]& paths, Duplicati.Library.Utility.IFilter& filter, System.Action`1[T] method) [0x0011c] in <8f1de655bd1240739a78684d845cecc8>:0

I’ve tried running repair, and manually running the backup to no extent.
I’m running Ubuntu 18.04 over FTP (Alternative).

Thanks.