Setup:

EAP225 (1)
IP via DHCP
Fallback: 192.168.2.201

EAP225 (2)

IP via DHCP
Fallback: 192.168.2.200

Router

IP: 192.168.2.254

DHCP range: 192.168.2.1 - 192.168.2.99

Desktop with Omada software controller

IP: 192.168.2.110 (static)

Switch tl-sg108e

IP: 192.168.2.250

Schematic overview:

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Case is this:

I've set-up my network several years ago via the software controller. Apart from some roaming issues between the hotspots I never really have problems.

Now, due too constructions in the house we've temporarily moved to the shed, connecting the shed and the house via MESH with two wifi hotspots. The network is configured to automatically MESH connect when the cable network fails.

This worked perfect for the first four days, but today I cannot get any connection between the two AP's anymore.

Whenever I open the MESH settings for the specific AP (2), it says, 'This AP is a wired AP currently'.

Which in itself is correct, because it needs to connect to the switch, linking the two networks together.
But it should still connect to AP (1), which it doesn't do anymore.

I've tried almost everything, already reset AP (2) and reconfigured it. Reset the switch, but there is no way I get these AP's to communicate with each other.

The distance between AP (1) and AP (2) is 10 meters in open sight. So no issues there. I've always gotten 200 MB/s over the past days.
Wifi in the house AP (1) works fine.

I've already replaced AP (1) and AP (2) with each other, but no difference. Wifi in the house keeps working. Shed does nothing.