Can't add new series - root path

Sonarr version (exact version): 3.0.4.1011
Mono version (if Sonarr is not running on Windows): 6.8.0.105
OS: Freenas 11.3 (Sonarr running in iocage)
Debug logs:

21-2-9 16:52:39.2|Warn|SonarrErrorPipeline|Invalid request Validation failed:
– Path: Folder is not writable by user sonarr
21-2-9 16:52:42.5|Warn|SonarrErrorPipeline|Invalid request Validation failed:
– Path: Invalid Path
– RootFolderPath: Invalid Path
21-2-9 16:52:51.2|Warn|SonarrErrorPipeline|Invalid request Validation failed:
– Path: Folder is not writable by user sonarr
21-2-9 16:53:42.0|Warn|SonarrErrorPipeline|Invalid request Validation failed:
– Path: Invalid Path

Description of issue:

When I try and add a series, I need to select the “root folder.” When I click in the root folder field I’m guided to add a new path. No matter what I choose from the list, when I click “Ok” the path is not updated. If I click the “Add [series]” button I get the message “Invalid path”

From the logs, it’s clearly a permissions issue. I had a quick read of chmod and how to use it, but everything I’ve tried has failed.

I’ve also noticed that I can’t add a new root folder in Media Management. Again, I can see and select the folder I want to use, but when I click Ok, nothing is added. Log file says:

21-2-9 17:40:20.6|Warn|SonarrErrorPipeline|Invalid request Validation failed:
– Path: Folder is not writable by user sonarr

have you confirmed that the user sonarr is running as actually has write access to that path?

if iocage is sort of like docker then has the volume/path been mapped correctly?