Hi @yokomitsu, let me see if I can help out here.
Your post has been translated to English as this is an International forum, please post any replies in English and it will be easier for me and other users to assist you.
The error message in question is an indication that Xperia Companion failed to load the software during the repair. I would suggest that you try to repair the software once again. Keep in mind thoug that since you cannot access the phone, you will need to start the repair with the phone unplugged from the computer and tick the "My device cannot be detected or started, or is a Smartwatch 3" checkbox before proceeding with the repair.
Also, do note that the repair will erase all user data from the phone. Let me know how it goes!
