I'm trying to call the payslip of employee by using button, in portal view to allow
the user to download his payslip report. But can't be able facing an error 
( KEYERROR: False). Please help me to solve this problem. All of this i'm doing in 
web portal form.

Payslip Model:

@http.route(['/employee/payslip/'], type='http', auth="public", website=True)
def portal_my_payslip_report(self, pay_id, access_token=None, report_type=None, download=False, **kw):
    try:
        payslip_sudo = self._document_check_access('hr.payslip', pay_id, access_token)
    except (AccessError, MissingError):
        return request.redirect('/my')

    if report_type in ('html', 'pdf', 'text'):
        return self._show_report(model=payslip_sudo, report_type=report_type, report_ref='hr_payroll.report_payslip', download=download)

    values = self._payslip_get_page_view_values(payslip_sudo, access_token, **kw)
    return request.render("website_payslip_portal.portal_report_payslip", values)

Payslip_portal_view

\ \ \ id="report_payslip_lang"
\ \ \ t\-attf\-href="/report/pdf/hr_payroll\.report_payslip/\#\{pay\.id\}"
\ \ \ title="Print"\ target="_blank">
    
    Print