5Ghz Wi-Fi doesn't work if wi-fi country code 00-World is used on TP-Link Archer C6(EU) Ver3.20

Basic working configuration:
dmesg.txt
wireless.txt

Steps to reproduce:

• Set Country Code: 00 - World

Result:

• 5GHz Wi-Fi stops working:

Mon Sep 12 08:08:17 2022 daemon.err hostapd: Line 6: Invalid country_code '00'
Mon Sep 12 08:08:17 2022 daemon.err hostapd: Cannot enable IEEE 802.11d without setting the country_code
Mon Sep 12 08:08:17 2022 daemon.err hostapd: 2 errors found in configuration file '/var/run/hostapd-phy1.conf'
Mon Sep 12 08:08:17 2022 daemon.err hostapd: Failed to set up interface with /var/run/hostapd-phy1.conf
Mon Sep 12 08:08:17 2022 daemon.notice netifd: radio1 (9477): Command failed: ubus call hostapd config_add {"iface":"wlan1", "config":"/var/run/hostapd-phy1.conf"} (Invalid argument)
Mon Sep 12 08:08:17 2022 daemon.notice netifd: radio1 (9477): Usage: ubus [<options>] <command> [arguments...]
Mon Sep 12 08:08:17 2022 daemon.notice netifd: radio1 (9477): Options:
Mon Sep 12 08:08:17 2022 daemon.notice netifd: radio1 (9477):  -s <socket>:             Set the unix domain socket to connect to
Mon Sep 12 08:08:17 2022 daemon.notice netifd: radio1 (9477):  -t <timeout>:            Set the timeout (in seconds) for a command to complete
Mon Sep 12 08:08:17 2022 daemon.notice netifd: radio1 (9477):  -S:                      Use simplified output (for scripts)
Mon Sep 12 08:08:17 2022 daemon.notice netifd: radio1 (9477):  -v:                      More verbose output
Mon Sep 12 08:08:17 2022 daemon.notice netifd: radio1 (9477):  -m <type>:               (for monitor): include a specific message type
Mon Sep 12 08:08:17 2022 daemon.notice netifd: radio1 (9477):                   (can be used more than once)
Mon Sep 12 08:08:17 2022 daemon.notice netifd: radio1 (9477):  -M <r|t>         (for monitor): only capture received or transmitted traffic
Mon Sep 12 08:08:17 2022 daemon.notice netifd: radio1 (9477):
Mon Sep 12 08:08:17 2022 daemon.notice netifd: radio1 (9477): Commands:
Mon Sep 12 08:08:17 2022 daemon.notice netifd: radio1 (9477):  - list [<path>]                  List objects
Mon Sep 12 08:08:17 2022 daemon.notice netifd: radio1 (9477):  - call <path> <method> [<message>]       Call an object method
Mon Sep 12 08:08:17 2022 daemon.notice netifd: radio1 (9477):  - subscribe <path> [<path>...]   Subscribe to object(s) notifications
Mon Sep 12 08:08:17 2022 daemon.notice netifd: radio1 (9477):  - listen [<path>...]                     Listen for events
Mon Sep 12 08:08:17 2022 daemon.notice netifd: radio1 (9477):  - send <type> [<message>]                Send an event
Mon Sep 12 08:08:17 2022 daemon.notice netifd: radio1 (9477):  - wait_for <object> [<object>...]        Wait for multiple objects to appear on ubus
Mon Sep 12 08:08:17 2022 daemon.notice netifd: radio1 (9477):  - monitor                                Monitor ubus traffic
Mon Sep 12 08:08:17 2022 daemon.notice netifd: radio1 (9477):
Mon Sep 12 08:08:17 2022 daemon.notice netifd: radio1 (9477): Device setup failed: HOSTAPD_START_FAILED

logread.txt

System

Hardware: TP-Link Archer C6(EU) Ver3.20

Review dmesg.txt, wireless.txt, and logread.txt, starting with the hostapd error that rejects country_code '00'. Trace how the 00-World setting reaches the 5 GHz configuration and verify the result on the TP-Link Archer C6 v3.20. Done means 5 GHz starts successfully with that country code and hostapd no longer reports HOSTAPD_START_FAILED.