Thanks @Vitaliy
in my config.inc.php, I found tag is allowed as below:
Is this ok? please correct me if there is any mistake.
following is what I entered in custom block source code
after I click ok and go back to open the source code window. It shows the code like this:
Although, I entered the tag for googleepis as well yet it replaces with <em tag by itself and produces the cloud icon.
But
For Academicons <i tags are altogether removed so it does not result an icon.
@kawahyu you have once raised this issue here
Were you able to solve it?
Your input is highly appreciated
Thanks