iPad: Pen does not respond or cannot draw lines.
If the pen does not respond or cannot draw lines when using a pen without pressure-sensitive on iPadOS 17.4.1 or later, reset the Pen Pressure Settings.
Make sure to turn off Enable Wacom stylus settings.
Procedure
1. Tap the Clip Studio Paint icon > Wacom stylus and turn off Enable Wacom stylus settings.
Uncheck it if the item is checked.
2. Tap the Clip Studio Paint icon > Pen Pressure Settings to reset the pen pressure.
For details on how to set up, please see the following page.