I have taken over the webmaster duties for a website that had Jomsocial installed. I do not have access to the previous webmaster who configure this. We had a pretty old version of Jomsocial installed so I have made a copy of the website and put it on a development area on my hosting server in order to test the functionality and installation of the newest version of Jomsocial before installing it on the live site. Installation itself went pretty smooth but I'm seeing errors on the edit profile page related to the Template and Profile type that I do not understand.

The field for the Template says: Unknown class CFieldsTemplates for field templates.
The field for the Profile type says: Unknown class CFieldsProfiletypes for field profiletypes.

See attached image.

Also, when we attempt to go to the homepage it instead displays one of the more recent events without any website template. I also included an image screenshot.

Can you help in explaining what is causing these.

Hi, Ric.

Blank page was caused by outdated JomSocial related module: Upcoming Events.
I disabled it. This module could be replaced by Community - Events Module.

Your second issue - "Unknown class CFields" - was caused by fields "Profiletype" and "template" that weren't assigned to any group. I assigned them to Basic information and issue is gone.

You still have some old JomSocial modules installed in your system. You need to review what extensions you have and which one are obsolete in extensions manager Backend -> Extensions -> Extension Manager -> Manage.