HOW TO FIX Mongoose 5.11.8 model.find() ERROR Operation `thanks-leaderboards.find()` buffering timed out after 10000ms

Question

How to solve model.find() function produces "buffering timed out after ... ms"? I\'m using mongoose v 5.11.8, npm v6.14.8 and mongodb v3.6.3

Here\'s the cod