A family of Microsoft word processing software products for creating web, email, and print documents.
Looking at the document, I see a TOC field followed by several HYPERLINK fields. All of these fields are inside a Table of Contents content control. The control is obviously damaged in some way.
I would delete the whole TOC and then recreate it via the dialog box at References > Table of Contents > Custom Table of Contents. This will create a TOC field which is not inside a content control.