Why I can not see the SSID of my AP5130DN

Device:
- AC6605 V200R007C20SPC300
- AP5130DN V200R007

Customer informed he install next antenna (wireless adaptor) in his Windows 10, after try to connect the wireless network can not see the SSID of the Huawei AP, another devices like mobiles phones or laptops can discover the SSID.

Antenna TP Link, 
Model: TL-WN881ND

There is no alarm information on the display diagnostic.

Because we did not find any alarm information in the AC need to review the physical Layer

1) Review the technical specifications of the PC ANTENNA.

2) Review if the antenna support the current transmition mode like 5Ghz or 2.4Ghz.

3) Review the radio parameters of the AP and confirm if the Antenna support the current band, channel & Badwith.

<AC-Huawei>display radio ap-id XXX

CH/BW:Channel/Bandwidth
CE:Current EIRP (dBm)
ME:Max EIRP (dBm)
CU:Channel utilization
ST:Status
------------------------------------------------------------------------------
AP ID Name          RfID  Band  Type    ST  CH/BW          CE/ME   STA    CU
------------------------------------------------------------------------------
XXX   AP1                0     2.4G  bgn     on   12/20M          29/29   0      33%
XXX   AP1                1     5G    an11ac  on  36/20M         30/30   0      1%
------------------------------------------------------------------------------

The customer configure a regulatory domain and configure the channels 1,7,12 for the 2.4GHz band.

#
regulatory-domain-profile name default
  dca-channel 2.4g channel-set 1,7,12
  dca-channel 5g channel-set 36,40,44,48,52,56,60,64,149,153,157,161,165
#

 The antenna supports only the channels 1,6 or 11
https://www.tp-link.com/il/faq-2253.html 

Solution

Configure the right channels in the "regulatory-domain-profile" 

<AC-Huawei>sys
[AC-Huawei]regulatory-domain-profile name default
[AC-Huawei-wlan-regulate-domain-default]dca-channel 2.4g channel-set 1,6,11
Info: In 20MHz bandwidth mode, available calibration channels include channels 1,6 and 11.
Info: For three 5G radios, configure at least five calibration channels. For two 5G radios, configure at least three calibration channels.

Also set the Channel on the AP:

[AC-Huawei-wlan-view]ap-id XXX
[AC-Huawei-wlan-ap-133]radio 0
[AC-Huawei-wlan-radio-133/0]channel 20 6
Warning: This action may cause service interruption. Continue?[Y/N] Y 

Then double check the cannel again: 

<AC-Huawei>display radio ap-id XXX
CH/BW:Channel/Bandwidth
CE:Current EIRP (dBm)
ME:Max EIRP (dBm)
CU:Channel utilization
ST:Status
------------------------------------------------------------------------------
AP ID Name          RfID  Band  Type    ST  CH/BW          CE/ME   STA    CU
------------------------------------------------------------------------------
XXX   AP1                 0     2.4G  bgn     on  6/20M          29/29   0      33%
XXX   AP1                1     5G    an11ac  on  36/20M         30/30   0      1%
------------------------------------------------------------------------------