Tasmota 4 gang switch eu without neutral

I have recently bought an athom switch, and before buying all the others, i want to make it work this one firstly.

It is a four-gang switch. So, it has the following holes: N (not used in my case), L (hot wire), L1,L2,L3,L4.

I have connected the hot wire to the L, and the other two wires that are coming from the switch box to L1 and L2, so the L3 and L4 remain not connected.

On L1 I have 3 led bulbs connected (i suppose they are at least 5 watt each) while on L2 I have a smart bulb connected (It is 9 watt). On the switch it is written that it works with a minimum load of 5w to a max of 200w for led bulbs

At the beginning In this schema I haven’t connected the capacitator which comes in the package to L1 or L2.

After turning on the main power, the switch starts to blink as well as the bulbs connected to L1.

Using a one-contact neon test lights, it lights on when touching the screw on L or on L1, but not on L2 where the light is not blinking and it is turned off.

I tried to find the AP network of the smart switch on my Phone using its wifi search.

I cannot find any new network, so I do not know how to proceed further in order to configure it.

I made other tests later. These are some pictures:

https://imgur.com/a/ApJzjhR

I have installed the capacitor. Unfortunately, I cannot proceed with the installation process.

The hot wire is the first wire on the left. Afterwards we have the other two wires connected to L1 and L2 (right to the hot wire).

After powering on the main ac power, the smart bulb connected to L1 started to blinks. It blinked for a couple of minutes and then it suddenly stops to blinks remaining turned on. On the Athom switch the third button is lighted on as in the picture.

I powered off the main ac power and consequently I powered it on again. This time the third button was red with the icon of the wifi blue.

Anyway on my phone I cannot find any tasmota network.

I tried to swap the second wire with the third one cycling the main power firstly off and the on. And the other 3 bulbs in the other room started to blinks (I suppose this one that before was in L2).

Using again the one-contact neon test lights, i found there is power on the screws of N, L1 and L3,L4 (N,L3 and L4 are not wire-connected at all, while L2 and L1 yes).

The strange thing is that if the third button on the switch is in red colour, touching the L4 screw , the colour turned to blue as in the second picture.

Anyway, I cannot the switch make to blinks again. So I cannot anymore put it on pairing mode.

So my questions are:

1. How to put the switch again in pairing mode, so that the wifi icon starts to blinks again?

2. What should further I do? How to make this switch works?