I noticed a couple of things upon restart. Do you guys know what it is and why it happens?

1) when im restarting my phone, i realize a quick message appears before it boots. That says "No memory card. phone photo, image, audio, video, album and moments features disabled" (i have one), is this normal? Some times it say no valid card too (I think its referring to SIM). Is this normal? Why does it do that?

2) Also one time when I rebooted, I noticed the widgets on my homescreen was a loaded weird. The spacing and text was not showing up properly, the size of widget looked compressed (weather and news app). What can cause this?

Thanks