Hi,
Thanks for sharing your requirement here at Freelancer, I will be more than happy to help you.
I understand that your Joomla, VM backup site is not working on digitalocean hosting so yes probably it is somehow related to compatibility issue, please allow me to check and fix this issue. In case if it's server configuration issue then we have to ask server admin to fix this issue.
I would like to mention that I will take payment only after completion of this job, I will first finish this job and then ask you to award and pay at the same time to maintain trust.
Regards,
Kapil