@Kashf 

 

Do you try other client devices? If all clients cannot open this page, you should check the voucher settings, please refer to the page 54 of the user guide:

https://static.tp-link.com/2018/201807/20180705/1910012437_AC500AC50_UG.pdf

 

Thanks for your kind reply, i did the same setting but same error,While i have Omada Controller on another location and that is working perfectly, my network map is CAP- Switch- Controller- Loadbalance- Modem

@forrest 

Even i try with other Access point and on Lan Computer, but same error