Convert graphic back to text

[Stephen229259846qpi]

For some reason, my text box (which contained a large amount of text) was converted to a graphic box. How do I convert it back to a text box so I can add/edit text? I am using the latest version of InDesign on a Mac. 

[Robert at ID-Tasker]

@Barb Binder

OP says that initially, it was an editable text:

https://community.adobe.com/t5/indesign-discussions/convert-graphic-back-to-text/m-p/14762669#M58253...