Can't import existing files on fresh install of Ubuntu 22.04

Sonarr version (exact version): 3.0.9.1549
Mono version (if Sonarr is not running on Windows): 6.8.0.105
OS: Ubuntu 22.04 (fresh install)
Debug logs:
2022-09-20 11:04:02.8|Debug|Api|[GET] /api/v3/rootFolder: 200.OK (5 ms)
2022-09-20 11:04:05.0|Debug|Api|[GET] /api/v3/filesystem?path=&allowFoldersWithoutTrailingSlashes=true&includeFiles=false: 200.OK (1 ms)
2022-09-20 11:04:08.1|Debug|Api|[GET] /api/v3/filesystem?path=%2Fmnt%2Fsean%2FmyMedia%2FtvShows&allowFoldersWithoutTrailingSlashes=true&includeFiles=false: 200.OK (1 ms)
2022-09-20 11:04:12.5|Warn|SonarrErrorPipeline|Invalid request Validation failed:
– Path: Path does not exist
2022-09-20 11:04:12.5|Debug|Api|[POST] /api/v3/rootFolder: 400.BadRequest (4 ms)
2022-09-20 11:05:09.2|Debug|Api|[GET] /api/v3/command: 200.OK (1 ms)
2022-09-20 11:05:09.2|Debug|Api|[GET] /api/v3/command: 200.OK (1 ms)
2022-09-20 11:05:09.2|Debug|Api|[GET] /api/v3/command: 200.OK (2 ms)
2022-09-20 11:05:09.2|Debug|Api|[GET] /api/v3/command: 200.OK (2 ms)
2022-09-20 11:06:39.1|Debug|Api|[GET] /api/v3/command: 200.OK (1 ms)
2022-09-20 11:06:39.1|Debug|Api|[GET] /api/v3/command: 200.OK (1 ms)
2022-09-20 11:06:39.1|Debug|Api|[GET] /api/v3/command: 200.OK (1 ms)
2022-09-20 11:06:39.1|Debug|Api|[GET] /api/v3/command: 200.OK (1 ms)
2022-09-20 11:06:39.4|Debug|Api|[GET] /api/v3/command: 200.OK (1 ms)
2022-09-20 11:06:39.4|Debug|Api|[GET] /api/v3/command: 200.OK (1 ms)
2022-09-20 11:06:54.0|Debug|Api|[GET] /api/v3/health: 200.OK (1 ms)
2022-09-20 11:06:54.0|Debug|ProcMountProvider|Failed to retrieve mounts from /proc/mounts

[v3.0.9.1549] System.UnauthorizedAccessException: Access to the path “/proc/mounts” is denied.
at System.IO.FileStream…ctor (System.String path, System.IO.FileMode mode, System.IO.FileAccess access, System.IO.FileShare share, System.Int32 bufferSize, System.Boolean anonymous, System.IO.FileOptions options) [0x001ef] in <12b418a7818c4ca0893feeaaf67f1e7f>:0
at System.IO.FileStream…ctor (System.String path, System.IO.FileMode mode, System.IO.FileAccess access, System.IO.FileShare share, System.Int32 bufferSize, System.IO.FileOptions options) [0x00000] in <12b418a7818c4ca0893feeaaf67f1e7f>:0
at (wrapper remoting-invoke-with-check) System.IO.FileStream…ctor(string,System.IO.FileMode,System.IO.FileAccess,System.IO.FileShare,int,System.IO.FileOptions)
at System.IO.StreamReader…ctor (System.String path, System.Text.Encoding encoding, System.Boolean detectEncodingFromByteOrderMarks, System.Int32 bufferSize) [0x00061] in <12b418a7818c4ca0893feeaaf67f1e7f>:0
at System.IO.StreamReader…ctor (System.String path, System.Text.Encoding encoding) [0x00000] in <12b418a7818c4ca0893feeaaf67f1e7f>:0
at (wrapper remoting-invoke-with-check) System.IO.StreamReader…ctor(string,System.Text.Encoding)
at System.IO.File.InternalReadAllLines (System.String path, System.Text.Encoding encoding) [0x00006] in <12b418a7818c4ca0893feeaaf67f1e7f>:0
at System.IO.File.ReadAllLines (System.String path) [0x00032] in <12b418a7818c4ca0893feeaaf67f1e7f>:0
at NzbDrone.Mono.Disk.ProcMountProvider.GetMounts () [0x0000c] in M:\BuildAgent\work\63739567f01dbcc2\src\NzbDrone.Mono\Disk\ProcMountProvider.cs:41

Description of issue: While trying to import existing series into a fresh install of Sonarr I get the error message saying “Unable to add root folder. Path does not exist.”
I have tried specifying “/” to try and get to the /media folder and I have tried a full path to where the tvShows are, “/media/sean/myMedia/tvShows/”. Not sure how to debug this.

Looks like an issue with your mounts and/or permissions? Potentially a good place to start looking anyway.