Center tag not working in ionic RC.0

in previous ionic releases we wree able to ceneter any element horizontally by including it in between the cenetr tag, but since the RC.0 release center tag is showing error.
Please help.
Or is there any other way to center the elements in our page?

use the utility attributes provided by ionic:

nothing is there to center a block or button… can you please suggest something else

my suggestion is learn css and look into flexbox as thats what Ionic uses.

And never use the <center></center> tag again
http://www.w3schools.com/tags/tag_center.asp

for the solution in css you can either give the parent a text-align:center;
or better on the button you could align in in the center with margin:0 auto;

http://www.w3schools.com/tags/tryit.asp?filename=tryhtml_center_css