Thanks for your reply,
It works again now… I was speaking with Divi support about this a few days ago. They suggested I turn off W3 Total Cache and it worked. I turned it on again a few days later and things were back to normal.
Now I just re-enabled it again to see which setting was causing the issue and W3 Total Cache does not have problems anymore…
Problem is that this is the second time it has happened. I will keep it on and hope it does not happen for a third time.
Not much else I can say, thank you for the reply.