I am getting an error message on 1099-SA page. But no indications of what's wrong.

Did you typed the information or did you copied and pasted from a form?

both

There may be a space or spaces that TurboTax is detecting. Delete the 1099-SA form and re-enter it.

1. In the upper right corner, click My Account > Tools.
2. In the pop-up window, select Delete a form.
3. Click Delete next to the form/schedule/worksheet and follow the onscreen instructions.

I tried that. Still getting this message:  "You must fix errors on this page before continuing."

See this previous answer, it can also help for when you retype it: <a rel="nofollow" target="_blank" href="https://ttlc.intuit.com/questions/2944928-1099-sa-errors?jump_to=answer_5403091">https://ttlc.intuit.com/questions/2944928-1099-sa-errors?jump_to=answer_5403091</a>