How to fix the error; ‘Error: Bootstrap tooltips require Tether (http://github.hubspot.com/tether/)’
For Bootstrap 4 stable: Since beta Bootstrap 4 doesn’t depend on Tether but Popper.js. All scripts (must be in this order): See the current documentation for the newest script versions. Only Bootstrap 4 alpha: Bootstrap 4 alpha needs Tether, so you need to include tether.min.js before you include bootstrap.min.js, eg.