https://community.tp-link.com/en/business/forum/topic/857570?replyId=1666984 Heya, when I tried a few weeks later (on pre-release firmware), it worked. Don't know what went wrong the first day, might...

Update failed for me, never had issues with uploaded firmware before. Model ER707-M2 v1.20 Controller Version 6.2.0.12 Firmware Version 1.3.1 Build 20251009 Rel.67687