password reset feature from laravel 5.2

I tried the password reset feature laravel 5.2, however when I tried to submit a password reset, perform an error like this:

Cannot insert the value NULL into column 'EMAIL', table 'KSP_ASTRA.dbo.PASSWORD_RESETS'; column does not allow nulls. INSERT fails. (SQL: insert into [password_resets] ([email], [token], [created_at]) values (, 97fdbc9463ea9807b5da729182960a31293e482ae33b9e42f81b6eee35bd6a4f, 2017-08-30 02:24:01.000))

the column email unreadable, even though I didn't change the default display auth password reset laravel.

please, If anyone could help

via Chebli Mohamed