I\'am using laravel 5.5 and it gives me that \"The page has expired due to inactivity. Please refresh and try again.\" This is awkward because I never encounter this error. Same
I assume that you are using laravel collective for forms builder.
Probably your issue is associate with CSRF Protection (https://laravelcollective.com/docs/master/html#csrf-protection).
Please check the above link and ensure that you include CSRF based on method or explicit Form::token();