LBP2 Filesystem mounting failed. (8001002b)

I didn't know if I should make a new thread for this, but in LBP3, all gameplay turns to a black screen when a prize bubble is collected. The Popit menu still appears, the points counter is there, but there is a black screen obstructing all gameplay. When a prize bubble is collected, this appears in the log.

Thread (main_thread) [HLE:0x00fb12c8, LR:0x00d0f2b0]} cellCamera TODO: cellCameraSetAttribute(dev_num=0, attrib=9=LED, arg1=0, arg2=0)

My settings are the same as my past log file, and this is spammed in the logs.

E {RSX [0x03f5f80]} RSX: Could not gather all required slices for cubemap/3d generation

Edit: It also happens with spawnpoints being reached.