The list of servers takes a long time to appear - Cloudmin

SYSTEM INFORMATION
OS type and version CentOS Linux 6.10
Webmin version 1.990
Cloudmin version 9.6

Hello!

The list of servers takes a long time to appear, I have 44, it happened to me a long time ago but now it is worse.
Most just have virtualmin connected.
What can I do to improve it?
Some revision that can be disabled?

Thank!