Your question translated:
On the prosody server with i2pd configured, 3072 bits of ssl.(also checked with 2048 bits and 4096)
On a PC, the pidgin client is running
On the phone, in the monocles chat and conversations clients, i2p writes the domain is not verified and the domain is not verifiable, respectively
Most likely you have to register through Tor or clearnet with the xmpp server. If you tried xmpp.ilita.i2p you have to import their certificate. Try with danwin1210.de (see website). The i2p eepsite is daniel.i2p