Check your page setup. Is it set at "Fit to..."? This is often the cause.
Change to "Adjust to...." then try to insert a page break.

"Karen" wrote:

I have a situation where I cannot insert a page break - I go to Insert Page
Break and there is no page break inserted. What could be happening? This
spreadsheet has some text boxes in it. Other than that, it's a basic
spredsheet.

Thank you, Karen