TP-Link Archer C7 v2 IPv6 problems

Hello

so ive been using at home on the router mentioned in the title this image made by infinitnet https://github.com/infinitnet/lede-ar71xx-optimized-archer-c7-v2

but i flashed the latest openwrt from the official repository OpenWrt 18.06.2

and the ipv6 witch is supported by my isp is not connecting

im doing all configurations in LUCI and in the system log i get these errors related with ipv6

Tue Mar 19 19:55:50 2019 daemon.err odhcp6c[2184]: Failed to send DHCPV6 message to ff02::1:2 (Address not available)
Tue Mar 19 19:55:53 2019 daemon.warn odhcp6c[2184]: Server returned IA_PD status 6 (No prefixes have been assigned)
Tue Mar 19 19:55:55 2019 daemon.warn odhcp6c[2184]: Server returned IA_PD status 6 (No prefixes have been assigned)
Tue Mar 19 19:55:59 2019 daemon.warn odhcp6c[2184]: Server returned IA_PD status 6 (No prefixes have been assigned)
Tue Mar 19 19:56:04 2019 daemon.warn odhcp6c[2184]: Server returned IA_PD status 6 (No prefixes have been assigned)
Tue Mar 19 19:56:07 2019 daemon.warn odhcp6c[2184]: Server returned IA_PD status 6 (No prefixes have been assigned)
Tue Mar 19 19:56:12 2019 daemon.warn odhcp6c[2184]: Server returned IA_PD status 6 (No prefixes have been assigned)
Tue Mar 19 19:56:16 2019 daemon.warn odhcp6c[2184]: Server returned IA_PD status 6 (No prefixes have been assigned)
Tue Mar 19 19:56:19 2019 daemon.warn odhcp6c[2184]: Server returned IA_PD status 6 (No prefixes have been assigned)

And the last error is spamed

this problem only occured after i flashed the 18.06.2

in the image made by infinitnet i had no problem at all but ive also tried to flash and use the image again and i have no connection to ipv6 also

my exprerience with linux is not much but i can ssh and edit the config files without much help

any help would be appreciated

thank you

The output of

ip link       # show link status
ip -6 addr    # what addresses have been assigned

would be helpful

the problem is solved somehow because my isp uses a vlan to deliver the internet service and i deleted the vlan and created again on the switch page on luci and it connected

but thank you anyway

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