why is my phone blocking wifi accesse

[AC Question]

Why is my phone blocking wifi access? I bought a phone on my stop over in hong kong, and ive landed in south africa and tried to connect to the airport wifi and the intial webpage loads then it goes to a blank white screen with the picture of a red pad lock and an X through the middle. The wifi successfully connects to my samsung tablet so why is it noth working on this phone. The phone is a Huawei. Is it a security setting or network setting, ive looked through everything please help?