Error in Smartlead: Could Not Add Lead to Campaign Issue

I keep getting an error in one of my columns for 'add lead to campaign' for smartlead: "Could not add lead" Every time I run the column again to "Run all rows that havent run or have errors," it doesn't fix the cells with errors I need to manually click and run each cell individually to fix this. Is this a bug? It's been happening to other columns with different enrichments for me as well.