Could not read font on CodeIgniter

Could not read font error messages on CodeIgniter in my case, it happen when my font file was broken. Font file broken can happened because bad connection when you upload your files via ftp. I've used captcha for login form that combined Sencha Extjs for UI dan CI for server side scripting. The solution is re-upload your font files dan make sure your font files is the good one, and the problem solved. In my case, my font files was broken so the file size has changed from 129.72 Kb to 48.48 Kb

That caused my login form cannot displayed like picture below

And the Code Igniter error messages