Hestiacp hangs and time out when clicking files-->Web

I have 2 servers. The first server has hestiacp 1.6.8 and it’s running smoothly. My other server has hestiacp 1.6.14 and it’s crashing continuosly since yesterday.
Not sure what’s happening. There is half the data than my 1st server. But when I go to files, and when I click Web, 90% of times it keeps loading and then says ‘Unknown’ in red (timeout). Even if it pass ‘Web’, then clicking on any domain also keeps on loading.

Can someone please help.