Urgent technical issue- page published but showing as 'not found'

I have set up a landing page and added our wordpress domain- installed the plug in and followed all instructions. I then published however when clicking on the url it shows as page not found. Does anyone know what is wrong here? I have looked at step by step guide and followed all to a t- but still getting this problem. When clicking on domains I have noticed and orange triangle saying ‘Fetching plugin status’ and says there are still some things i need to do in my wordpress admin yet in my WP admin there is nothing showing that needs to be done. Any help hugely appreciated.