If you find the paper keeps tearing, try using a slightly thicker dense paper for more durability.
Look at the folded edge of the paper between your two original end slits. Get Out
Ensure you have an odd number of cuts to make the loop work correctly. If you find the paper keeps tearing, try
Find the folded edge. Cut a slit about 1 inch from the left side, starting from the fold and stopping about half an inch before the open edge. Do the exact same thing on the far right side. Get Out