icons in blue buttons no longer show up

Provider: VirMach

Virtualization Type: KVM

System: Ubuntu 18.04LTS and centos 7

Installation option: All set to defaults

OLS or Enterprise?
OLS

Installing from official server or mirror server?
official

Not sure of the following 5, all was left as default in the installation:
Install Memcached extension for PHP?
yes

Install LiteSpeed Memcached?
yes

Install Memcached?
yes

Install Redis extension for PHP?
yes

Install Redis?
yes

Problem:

Ever since updating Cyberpanel to the latest version, I’ve lost the icons in all the “blue buttons” in Cyberpanel.

I’ve re-installed the OS from centos 7 to Ubuntu 18.04LTS, but the issue remains.

I’ll bump my post since it seems like no one looked into it.