... se utilizzi il protocollo Annex A/L/M prova questa versione più recente di quella installata sulla tua! https://www.tp-link.com/it/support/download/archer-d9/#Firmware

... but it is obvious that it gives you errors, you cannot use the same port for two different things, despite the two different IPs assigned to the 3074, the peripheral that first accesses the port...

... by any chance the problem arises after changing some parameter that was not active before? because the problem that arises is quite strange ... it almost makes me think (the doubt is seen that...

... I would propose the update if there is for your country or the firmware Reflesh, but perhaps it is better to wait for the Tp-Link Technician since it is probably a sw problem.

Yes, try to use a different browser by deactivating the AdBlock if you have entered it.

try to make a Firmware Reflesh, maybe it could be slightly corrupted, sometimes nothing strange can happen! Obviously it is an attempt, I cannot guarantee you that this is actually the case, but from...