Many links not working

Hi,

We seem to be having a problem where lot’s of our old links and even some newer one’s are broken.

There is a 404 error message

see this link as an example

https://www.gapforceblog.org/2011/03/15/borneo-extreme-expedition-%E2%80%93-conservation-project-%E2%80%93-march-2011/

anyone know why this might be?

many thanks

Adam (Gapforce)