hyperlinks not adding to website text

Hi

I am trying to add links to pages in the text on my site and it does not seem to be working.
When I select the text and right click then select the add link option, I am then selecting the 'link to post or page' option and selecting the appropriate page (in this case blog) and then saving. The link does not appear to be saving and is not working.
I have granted support access.
Thank you