And part of the log from Radarr:
[v3.0.0.3129] NzbDrone.Mono.Disk.LinuxPermissionsException: Error setting permissions: EPERM
at NzbDrone.Mono.Disk.DiskProvider.SetPermissions(String path, String mask) in d:\a\1\s\src\NzbDrone.Mono\Disk\DiskProvider.cs:line 90
at NzbDrone.Core.MediaFiles.MediaFileAttributeService.SetMonoPermissions(String path, String permissions) in d:\a\1\s\src\NzbDrone.Core\MediaFiles\MediaFileAttributeService.cs:line 87
2020-7-8 23:47:37.0|Warn|ImportApprovedMovie|Couldn't import movie /downloads/completed/Moovie/movie.mkv
[v3.0.0.3129] System.UnauthorizedAccessException: Access to the path '/movies/Movie/movie.mkv.partial~' is denied.
---> System.IO.IOException: Operation not permitted
--- End of inner exception stack trace ---
at Interop.ThrowExceptionForIoErrno(ErrorInfo errorInfo, String path, Boolean isDirectory, Func`2 errorRewriter)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String path, OpenFlags flags, Int32 mode)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options)
at System.IO.FileSystem.CopyFile(String sourceFullPath, String destFullPath, Boolean overwrite)
at System.IO.File.Copy(String sourceFileName, String destFileName, Boolean overwrite)
at NzbDrone.Mono.Disk.DiskProvider.TransferFilePatched(String source, String destination, Boolean overwrite, Boolean move) in d:\a\1\s\src\NzbDrone.Mono\Disk\DiskProvider.cs:line 301
at NzbDrone.Mono.Disk.DiskProvider.CopyFileInternal(String source, String destination, Boolean overwrite) in d:\a\1\s\src\NzbDrone.Mono\Disk\DiskProvider.cs:line 224
at NzbDrone.Common.Disk.DiskProviderBase.CopyFile(String source, String destination, Boolean overwrite) in d:\a\1\s\src\NzbDrone.Common\Disk\DiskProviderBase.cs:line 213
at NzbDrone.Common.Disk.DiskTransferService.TryCopyFileTransactional(String sourcePath, String targetPath, Int64 originalSize) in d:\a\1\s\src\NzbDrone.Common\Disk\DiskTransferService.cs:line 482
at NzbDrone.Common.Disk.DiskTransferService.TransferFile(String sourcePath, String targetPath, TransferMode mode, Boolean overwrite, DiskTransferVerificationMode verificationMode) in d:\a\1\s\src\NzbDrone.Common\Disk\DiskTransferService.cs:line 342
at NzbDrone.Common.Disk.DiskTransferService.TransferFile(String sourcePath, String targetPath, TransferMode mode, Boolean overwrite, Boolean verified) in d:\a\1\s\src\NzbDrone.Common\Disk\DiskTransferService.cs:line 232
at NzbDrone.Core.MediaFiles.MovieFileMovingService.TransferFile(MovieFile movieFile, Movie movie, String destinationFilePath, TransferMode mode) in d:\a\1\s\src\NzbDrone.Core\MediaFiles\MovieFileMovingService.cs:line 115
at NzbDrone.Core.MediaFiles.MovieFileMovingService.CopyMovieFile(MovieFile movieFile, LocalMovie localMovie) in d:\a\1\s\src\NzbDrone.Core\MediaFiles\MovieFileMovingService.cs:line 92
at NzbDrone.Core.MediaFiles.UpgradeMediaFileService.UpgradeMovieFile(MovieFile movieFile, LocalMovie localMovie, Boolean copyOnly) in d:\a\1\s\src\NzbDrone.Core\MediaFiles\UpgradeMediaFileService.cs:line 73
at NzbDrone.Core.MediaFiles.MovieImport.ImportApprovedMovie.Import(List`1 decisions, Boolean newDownload, DownloadClientItem downloadClientItem, ImportMode importMode) in d:\a\1\s\src\NzbDrone.Core\MediaFiles\MovieImport\ImportApprovedMovie.cs:line 123
2020-7-8 23:48:59.8|Warn|ImportApprovedMovie|Couldn't import movie /downloads/completed/Movie/movie.mkv
[v3.0.0.3129] System.ArgumentNullException: Value cannot be null. (Parameter 'path2')
at System.IO.Path.Combine(String path1, String path2)
at NzbDrone.Core.MediaFiles.UpgradeMediaFileService.UpgradeMovieFile(MovieFile movieFile, LocalMovie localMovie, Boolean copyOnly) in d:\a\1\s\src\NzbDrone.Core\MediaFiles\UpgradeMediaFileService.cs:line 55
at NzbDrone.Core.MediaFiles.MovieImport.ImportApprovedMovie.Import(List`1 decisions, Boolean newDownload, DownloadClientItem downloadClientItem, ImportMode importMode) in d:\a\1\s\src\NzbDrone.Core\MediaFiles\MovieImport\ImportApprovedMovie.cs:line 123
2020-7-8 23:50:30.0|Warn|ImportApprovedMovie|Couldn't import movie /downloads/completed/Movie/movie.mkv
[v3.0.0.3129] System.ArgumentNullException: Value cannot be null. (Parameter 'path2')
at System.IO.Path.Combine(String path1, String path2)
at NzbDrone.Core.MediaFiles.UpgradeMediaFileService.UpgradeMovieFile(MovieFile movieFile, LocalMovie localMovie, Boolean copyOnly) in d:\a\1\s\src\NzbDrone.Core\MediaFiles\UpgradeMediaFileService.cs:line 55
at NzbDrone.Core.MediaFiles.MovieImport.ImportApprovedMovie.Import(List`1 decisions, Boolean newDownload, DownloadClientItem downloadClientItem, ImportMode importMode) in d:\a\1\s\src\NzbDrone.Core\MediaFiles\MovieImport\ImportApprovedMovie.cs:line 123
2020-7-8 23:50:59.7|Info|RssSyncService|Starting RSS Sync
2020-7-8 23:51:09.8|Info|DownloadDecisionMaker|Processing 500 releases
2020-7-8 23:51:17.1|Info|RssSyncService|RSS Sync Completed. Reports found: 500, Reports grabbed: 0
2020-7-8 23:52:00.1|Warn|ImportApprovedMovie|Couldn't import movie /downloads/completed/Moon.2009.2160p.UHD.Remux.HEVC.HDR.Atmos.TrueHD.7.1-playBD/Moon.2009.2160p.UHD.Remux.HEVC.HDR.Atmos.TrueHD.7.1-playBD.mkv
[v3.0.0.3129] System.ArgumentNullException: Value cannot be null. (Parameter 'path2')
at System.IO.Path.Combine(String path1, String path2)
at NzbDrone.Core.MediaFiles.UpgradeMediaFileService.UpgradeMovieFile(MovieFile movieFile, LocalMovie localMovie, Boolean copyOnly) in d:\a\1\s\src\NzbDrone.Core\MediaFiles\UpgradeMediaFileService.cs:line 55
at NzbDrone.Core.MediaFiles.MovieImport.ImportApprovedMovie.Import(List`1 decisions, Boolean newDownload, DownloadClientItem downloadClientItem, ImportMode importMode) in d:\a\1\s\src\NzbDrone.Core\MediaFiles\MovieImport\ImportApprovedMovie.cs:line 123