[Solved] Pressing X is not working

I'm trying to run a game for the first time but I'm stuck at the "Game is being installed to the hard disk drive" dialog, which wants me to press X. It seems that none of the controls are working. I tried it with the default keyboard controls and with an evdev device. The gamepad settings menu seems to work normally.

What looks weird to me in the logs are the following lines:

·E 0:00:08.555847 {dialog input thread} RSX: Pad handler expected but none initialized!
·E 0:00:08.555871 {dialog input thread} RSX: Dialog input loop exited with error code=-3
·W 0:00:08.627346 {PPU[0x1000000] Thread (main_thread) [0x003b5f64]} sys_io: cellPadInit(max_connect=7)
·W 0:00:08.635157 {PPU[0x1000000] Thread (main_thread) [0x00b87654]} sys_io: cellKbInit(max_connect=7)
·W 0:00:08.635182 {PPU[0x1000000] Thread (main_thread) [0x00430350]} sys_io: cellMouseInit(max_connect=7)

Could it be that the pad is loaded after it's being checked for? Is there a way to fix this? Thanks

OS: ArchLinux
CPU: AMD FX™-8350
GPU: GeForce GTX 1060 6GB
Nvidia Driver Version: 387.34
RAM: 16 GB

Disable the native UI for the time being on the settings and try again

Thanks. Disabling the native user interface under the Emulator settings made it possible to install the game. I was getting a segfault crash when starting the game after the installation finished though. I enabled the native user interface again and now the game's graphics even run pretty smoothly. The audio is stuttering but this seems to be game specific for me.