Ways to prevent TokenMismatch Exception

I have analyze that ratio of getting Token Mismatch Error is very high. And this error getting because of some of the silly mistakes. There are many reasons developers are doing mistakes. Here are some of the examples.

1. Not sending _token on header.
2. Not sending _token on data when using ajax.
3. Not Permission on Storage Path.
4. Invalid Session Storage path.

And there many other reasons, feel free to edit this question for more more ways to prevent this type of error.

via Chebli Mohamed