Hi @arnaudbroes, thank you so much for replying.
I have a few updates:
I did the browser console and it was complaining about wp nonce and 403 errors. I remembered just before doing this i changed the site URL from https://example.com to https://www.example.com (the wordpress URL did not change from https://example.com)
So i put the above to https://example.com and got though it. I think we can say the above issue got sorted, but would you know how and if i can get my site URL to https://www.example.com and not run into this ?
Many thanks,
Imthaz