@forrest For the issue you cannot downgrade the firmware, it is truly strange. Can you make more screenshots about it? For the issue you cannot downgrade the firmware, it is truly strange. Can you...

@forrest https://www.tp-link.com/en/support/download/eap110-outdoor/#Firmware i tried your above link, same error. btw, this is the link i usually use to download the firmware...

@forrest already reset it several times, same error occurs. the bug/issue is that client devices can pass the portal authentication after disconnected from the Controller.

Because of the bug of firmware 3.4.0, i want to downgrade to FW 3.2.0 but after manually upgrading it always fails(please see above picture).

same problem with mine, hope it will be fix soon. eap110 v3 firmware: 3.4.0 Build 20191014 Rel. 37397