Mibo needs something called "hardware acceleration" to perform fast and fluent. If hardware acceleration is disabled you might experience some or all of these issues:

Loading screen taking a long time to load
Looks like the lights a flickering, fully black flags in the room, other items missing or looking weird
Walking around is not fluid at all, it feels like you take about 1 or 2 "steps" a second instead of a fluid walking motion
Being disconnected after a little while in Mibo

Issues due to disabled hardware acceleration

Loading screen taking very long

When the loading screen is taking a long time to load a Mibo work it will indicate this with a message below the progress bar. If you have to wait a long time on this screen this might be an indication hardware acceleration is disabled:

Effects of missing hardware acceleration on the entry screen

On the left hand side Mibo with hardware acceleration, on the right hand side without. Notice the lighting flickering, the up-/downward Mibot movement being not fluent and a part of the floor missing at the bottom.

Black posters and/or flags missing

On the left hand side you see the posters as expected. On the right hand side the posters are fully black because hardware acceleration is disabled.

Walking around and movement not being fluent

Notice how on the left hand side the movement is fluent and continues, while on the right hand side (with hardware acceleration disabled) it feels like we move only with 1 or 2 steps per second.