Default SIM card removed error CM11

Hey everyone,

Starting around two days ago, my S4 started giving me the above mentioned error around twice a day. I was curious if other people have run into this error before and knew of any remedies. I attached the error prompt to this post.

At this point I'm not sure if this is a hardware or software error. Has anyone using CM11 experienced this problem before? I haven't tried replacing my SIM card yet.

Any insight would be greatly appreciated.
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"You see, my ambition was not to confound the engineering world but simply to create a beautiful piece of art." - Kit Williams

Phone Progression:
|| Sprint || Sanyo Katana II --> Samsung SPH-M520
|| AT&T || Samsung Solstice --> HTC Aria --> Samsung Infuse 4g --> HTC One X --> Samsung Galaxy S4