Hi Tarik,
The error message you’re seeing: Error: Timed out after 30000 ms while waiting to connect implies that the related mongod process either did not start or there is a network misconfiguration (whitelisting, firewall, etc.) that prevents connection to be made.
Having said that, Ops Manager is part of MongoDB Enterprise Advanced edition which is a commercially supported product. If your organisation/company already has a commercial subscription I would suggest to open a case in the Commercial Support Portal. They would be able to provide you with the support required to successfully upgrade your Ops Manager deployment.
Alternatively if you are evaluating MongoDB Enterprise and interested, please send me a private message with your contact details and I can request a MongoDB Account Executive to contact you and provide you with a solution.
Best regards,
Kevin