I have a problem after upgrade my DAVdroid application on FDroid (i was some versions before last one)

My certificate isn’t accepted by DAVdroid anymore since the upgrade.
I run Baikal on my Raspberry Pi at home and don’t have DNS (don’t need)

Before it worked fine, Now i have this message:
"Le serveur n’a pas pu s’authentifier comme “xx.xxx.xxx.xxx”. Le certificat est valide uniquement pour:

CN=xx.xxx.xxx.xxx, O=YYYYYYYY, ST=MaVille, C=FR

Voulez-vous vous connecter quand même?.."

I have CAdroid installed to import the certificate, i uprade it the same time as DAVdroid and it didn’t worked too after that to fetch my certificat.
I have to get the previous version of CAdroid back to fetch successfully my certificate.
But i can’t get the version of DAVdroid i got before on FDroid…

Any Idea?
Sorry for my english.