R1D2 wrote VLAN 1 bug in TL-SG018E V2 has been fixed since 2018-01-09 already. See post #20 here: https://community.tp-link.com/en/business/forum/topic/96245?page=2 TL-SG108E V1 has no web UI at all....

Hello, for the version V4 is now a new firmware aviable with a bug fix for the VLAN1 problem. Is this also possible for the version V1 to V3 we use all this versions! Regards Thomas