External Shares - SSL Error

Hi Folks,

I am attempting to create a “newcloud” external storage connection.
I am running store1.domain.com on my shared host and I am running store2.domain.com on a separate server.
The SSL certs are issued by LetsEncrypt but I am being issued with the below error if I use SSL.

Any ideas or suggestions would be welcomed.

OS: linux
Error: Sabre\HTTP\ClientException: SSL certificate problem: unable to get local issuer certificate

Without SSL: working
Import LetsEncrypt ROOT CA on my shared host which is making the connection backusing "occ security:certificates:import " (This is done via a cron job as I do not have shell access)


Anyone have an ideas?
I have run down all my troubleshooting and come up with nothing.