Tasks page stuck had to refresh to continue so i lost out on bonus points

Hi Team,
Please see below screenshots. Whilst i was in the tasks lab working on Installation and configuration of Iptables it stuck and the page became blank.

Also,
The validation of the solution took a very long to complete(about 6mins).
Please see below.

@ASAAC
Sorry for this issue, sometimes such issues occur due to network latency or some back end issues. Is it working fine now?

Oh yes it worked. However, i had to do another session.
Thank you