Power cycling your console (PlayStation 4 & Xbox One): Turn off your console » unplug power-cable for 1min. » Plug power-cable back » restart console » Run Touhou Seirensen ~ Undefined Fantastic Object. again.
Install Missing Multiplayer packages.
How to Fix Touhou Seirensen ~ Undefined Fantastic Object. Game Server Connection Problems:
Reset Winsock:
Press » Search bar » and type CMD. Now, Right-click Command Prompt when it comes up as a result and select Run as administrator. In Command Prompt, type 'netsh winsock reset' and hit Enter (on your keyboard). Now, Restart your computer and Launch Touhou Seirensen ~ Undefined Fantastic Object. and check if the issue persists.
Close all other Internet connected apps.
Restart your network (modem or wi-fi).
Contact Mediascape Co., Ltd. Customer Service
If the problem still persists, contact Mediascape Co., Ltd. customer support. Here is how:
Open email client
Provide all neccessary details about the issues you're experiencing.