Common errors in Bagisto and their solutions?

[bagisto-mogul]

1. Class Encrypter does not exists?
   A. Run the command: 'php artisan key:generate'

2. Some exception like file_put_contents............?
   A. Run the command php artisan vendor:publish

[RK REZA]

3. Class Number Format Not Found

[RK REZA]

4. Trying to get property 'role' of a non-object