MT1300 FW 3.203 / 3.211 b4 Wifi Repeater does not work with 5GHz

I tested ethernet uplink (WAN) and downlink (LAN1 and 2), they are working fine.
Also wifi repeater uplink to 2.4GHz works, but just gives 45 Mbps.

The access point is a Unifi HD line model and 2.4GHz and 5GHz are separated to use 2 different SSIDs.

When scanning, the Beryl does see both 2.4GHz and 5GHz WLANs.
I have turned off the downstream wifi APs for clients, but still it won’t connect to the 5GHz SSIDs (I tried different options on the Unifi AP, but that makes no difference).

A factory reset and an upgrade to 3.211 beta 4 did not help either.

I actually bought the Beryl because the Brume-W wifi repeater performance was not acceptable. That however means that I definitely need to use the Beryl’s 5GHz as Wifi repeater uplink to get better performance. And now this.

Can this be fixed and how?

Can you give more details about the upstream 5G wifi settings, e.g. channel, encryption etc?

Also pls get the log (ssh to the router and use command logread) when it failed to connect.

This is a Unifi setup. Found nothing that would not work with it - so far.
5GHz Channel 36 VHT 160, WPA2 PSK

grepping in logread for -i error gives:
Mon Dec 27 12:04:54 2021 kern.warn kernel: [ 547.282939] ERROR: BSS idx (0) nor ready. (subtype 11)
Mon Dec 27 12:04:58 2021 kern.warn kernel: [ 551.673967] WPAPSK Key length(0) error, required 8 ~ 64 characters!(keyStr=)
Mon Dec 27 12:04:58 2021 kern.warn kernel: [ 551.683113] ERROR: BSS idx (0) nor ready. (subtype 11)
Mon Dec 27 12:05:03 2021 kern.warn kernel: [ 556.074195] WPAPSK Key length(0) error, required 8 ~ 64 characters!(keyStr=)
Mon Dec 27 12:05:03 2021 kern.warn kernel: [ 556.082941] ERROR: BSS idx (0) nor ready. (subtype 11)
Mon Dec 27 12:05:07 2021 kern.warn kernel: [ 560.474181] WPAPSK Key length(0) error, required 8 ~ 64 characters!(keyStr=)
Mon Dec 27 12:05:07 2021 kern.warn kernel: [ 560.482914] ERROR: BSS idx (0) nor ready. (subtype 11)

The password is exactly 64 characters long. If that does not work, it is a bug.

I tried it with 63 characters, that still did not work. Much shorter passwords did work, the wifi rates were nice.

I would recommend to provide a bugfixed firmware in order to allow for the 64 character passwords as defined as acceptable for WPA2.

Obviously none of your users ever used that long passwords, but for my environment it is standard.

I verified and it is true.

MT1300 can support long password in AP mode but not in repeater mode. I have submitted a bug internally.