S3/ External storage problem

Nextcloud installed purely to view photos - all good.
I’m trying to connect to S3 and store photos there but have constantly had errors.

Using the ’ External storage support’ addon I have configured everything as required but, nothing is being pushed to the bucket and I get the same message: “Last job execution ran a day ago. Something seems wrong.” with no idea what exactly is wrong.

Everything is configured correctly, green ticks, and even when i access mysite.com/cron.php I get a ‘success’ message.

I have grabs I can post showing all the settings etc but, in the meantime, anyone have a clue why I keep getting this error?

Is it possible it is to do with the smbclient not being installed!