Sue,
The user guide Editing Your Project Homepage should have some useful information for this and other problems like it!
In any case, I think you can ask whoever is an admin on the homepage (aka the person who created the page - I think that’s Doris in this case) to also make you an admin so you can edit. If you cannot get in touch with the admin for some reason, we can ask someone who has super-admin powers (e.g., @apurva) to step in.
best,
Jonathan