I recently intalled OSClass version 3.8.0 and got it working successfully. Then right after I updated to version 4.3.2 ... I cannot edit a widget that I created for the footer, and I also cannot add content to a new page when trying to create the new page.
For the widget, the first field labeled "Description (for internal purposes only)" works fine ... but the next field labeled " HTML Code for the Widget" is missing. Only that title of the field is there, but there is no field to enter the info into.
For creating a new page ... under Manage Pages, and then Add New ... the main content field is missing.
The top 2 fields and their field descriptions (Enter title here * and Internal name) are there, and usable, but the 3rd field labeled Description * ... is completely missing. 
On my server ... I have (Allow URL Fopen) set as Disabled.   Would that affect it? 
 

That field is generated by tinyMCE, if is not visible, it means you have javascript errors on site those can be seen in browser console.

Ok, thank you for the information.  I appreciate it.  I think I have it resolved now.

Cool