I found this answer elsewhere from someone named Jonah and it worked for me. You can google for how to do a nice update. I was having this problem after a system update of my Samsung Galaxy S9 today. Here's Jonah's answer " I think i was able to get rid of that by first attempting to do a uicc unlock, then when that failed i clicked on the omadm notification in the upper slide down thing' and it updated. Who knows why or if itll last but thats what i did anyhow". In my case the uicc update succeeded.
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