I have experienced the same issue with both Chrome and IE11 with Cloverleaf 6.0. Unfortunately I have no solution, but you’re not alone!
I have a copies of 6.1 and 6.1.1 installed for testing, so I just now checked those and they seem to open fine in both browsers, so it may just be a 6.0 issue (do not have earlier versions on hand to check).
