ImportProcessWorker: Unable to process import: file does not exists

Troubleshooting Command Line Interface
1

Summary
We are running a self hosted version of Mattermost in Kubernetes. I am busy importing data from a Slack export
I followed the guide Migrate from Slack - Mattermost documentation

Using mmctl for everything as in the documentation.

Getting to where I need to run the import and after executing the import I get:
ImportProcessWorker: Unable to process import: file does not exists.

Steps to reproduce
Running on self hosted (kubernetes)
Run upload after authenticating to the Mattermost instance.
Verified the file is in data/import by going into the container and checking the data directory
Run the process command
Job fails due to file does not exist.

I have tried to run the import on the file using local mode as well with the same error message appearing.
Expected behavior
Import flow should work as according to documentation

Observed behavior
After running the process command and checking in on the job I see:

ID: edicdj7kc3rp7dfhctgem6g9cr
  Status: error
  Created: 2024-05-06 17:27:44 +0200 CEST
  Started: 2024-05-06 17:27:51 +0200 CEST
  Data: map[error:Error during job execution. — ImportProcessWorker: Unable to process import: file does not exists. import_file:5sibbdyfmty4icudig1nziikzw_mattermost-bulk-import.zip]
2

My first thought is a general reminder that a file may exist on a certain path on the host OS, but inside of the container may not be there. Also, are you running SELinux or App Armor or anything like that?

Can you open a shell inside of the container and ls -lZ the bulk import file?