Black captcha code on the surfboard central app and GUI page

Hi there, 

My friend recently purchased SBG8300 and I was helping her in setting up the device. During the process there was a security check and that was asking for a captcha code to type in, but it was blank, and no captcha is available. this was on the surfboard central app.

when I tried completing it in 192.168.0.1 on the network set up wizard step 1, again there was a blank captcha code and was not able to complete the set up. I will appreciate if anyone can help me with this.