installation done but could not mounted with quota enabled

i need help on this.
I installed Virtualmin on VPS CentOS 7.
Installation done with all green but only this line below appear.

"The filesystem / could not be remounted with quotas enabled.
You may need to reboot your system, and/or enable quotas in the Disk
Quotas module. "

May i know how to enable the quotas? i can’t access through browser…

Thank you