Can I give you access to our copied site?
It would be much easier if you would take over these steps to help us.
I just don't have the technological understanding for all this
Welcome to the WPML support forum. I will do my best to help you to resolve the issue.
Please fill in the private details fields after a full site backup{mandatroy}. I would like to access the admin area of your new staging site for further checking. Refer to the following links for more details about our private information-sharing policies.
Also, please share more about the issue you are facing now while translating a page in the staging site. It will be great if you can share a couple of screenshots for a better understanding.
Thank you for the login information. I have upgraded to the latest version of WPML(4.6.3) manually and now it is possible to translate the posts using WPML Advanced Translation Editor.
So please check if you can translate the post via WPML Advanced Translation Editor on the staging site and let us know your feedback.