slimで改修せねばいけなくて、
滅茶苦茶テンパって焦ったので備忘を兼ねて書きます

下の様に書いて動かない、なんでじゃ…と慌ててましたが

    - client_invitations.each do |invitation|
      - invitee_client = ::Reach::Client.find_by(id: invitation.invitee_client.try(:id))
      tr
        td= invitation.id
        td= invitation.client_contract_entry_id
        td= "#{invitation.inviter_client.name}: #{invitation.inviter_client.id}"
        td= "#{invitation.invitee_client.try(:name)}: #{invitation.invitee_client.try(:id)}"
        - if invitee_client.try(:client_page_layout).present? && invitee_client.client_page_layout.page_publish_status.publication?
          td.link= link_to 'URL', show_user_frontend_reach_client_url(invitee_client.client_page_layout.url_name), target: 'blank'
        - else
          td= '非公開'
        td= l invitation.approved_at
        td= l invitation.first_published_at
        td= l invitation.payment_flag ? '支払済' : '未払い'
        td=
           = link_to '支払済', backend_reach_invitation_path(invitation), method: :put, params: {payment_flag: false}, class: 'btn btn-danger form-control'
           .button-margin
           = link_to '未払い', backend_reach_invitation_path(invitation), method: :put, params: {payment_flag: false}, class: 'btn btn-info form-control'

invitation.payment_flag ?のlいらなかったし、
最後のtd ＝が多かったでそら動きませんわー！

        tbody
    - client_invitations.each do |invitation|
      - invitee_client = ::Reach::Client.find_by(id: invitation.invitee_client.try(:id))
      tr
        td= invitation.id
        td= invitation.client_contract_entry_id
        td= "#{invitation.inviter_client.name}: #{invitation.inviter_client.id}"
        td= "#{invitation.invitee_client.try(:name)}: #{invitation.invitee_client.try(:id)}"
        - if invitee_client.try(:client_page_layout).present? && invitee_client.client_page_layout.page_publish_status.publication?
          td.link= link_to 'URL', show_user_frontend_reach_client_url(invitee_client.client_page_layout.url_name), target: 'blank'
        - else
          td= '非公開'
        td= l invitation.approved_at
        td= l invitation.first_published_at
        td= invitation.payment_flag ? '支払済' : '未払い'
        td=
           = link_to '支払済', backend_reach_invitation_path(invitation), method: :put, params: {payment_flag: false}, class: 'btn btn-danger form-control'
           .button-margin
           = link_to '未払い', backend_reach_invitation_path(invitation), method: :put, params: {payment_flag: false}, class: 'btn btn-info form-control'


    tbody
    - client_invitations.each do |invitation|
      - invitee_client = ::Reach::Client.find_by(id: invitation.invitee_client.try(:id))
      tr
        td= invitation.id
        td= invitation.client_contract_entry_id
        td= "#{invitation.inviter_client.name}: #{invitation.inviter_client.id}"
        td= "#{invitation.invitee_client.try(:name)}: #{invitation.invitee_client.try(:id)}"
        - if invitee_client.try(:client_page_layout).present? && invitee_client.client_page_layout.page_publish_status.publication?
          td.link= link_to 'URL', show_user_frontend_reach_client_url(invitee_client.client_page_layout.url_name), target: 'blank'
        - else
          td= '非公開'
        td= l invitation.approved_at
        td= l invitation.first_published_at
        td= invitation.payment_flag ? '支払済' : '未払い'
        td
           = link_to '支払済', backend_reach_invitation_path(invitation, payment_flag: true), method: :put, class: 'btn btn-danger form-control'
           .button-margin
           = link_to '未払い', backend_reach_invitation_path(invitation, payment_flag: false), method: :put, class: 'btn btn-info form-control'

最後にconfirmつけておしまいっ！
slimが来てもテンパらないようにします

    tbody
    - client_invitations.each do |invitation|
      - invitee_client = ::Reach::Client.find_by(id: invitation.invitee_client.try(:id))
      tr
        td= invitation.id
        td= invitation.client_contract_entry_id
        td= "#{invitation.inviter_client.name}: #{invitation.inviter_client.id}"
        td= "#{invitation.invitee_client.try(:name)}: #{invitation.invitee_client.try(:id)}"
        - if invitee_client.try(:client_page_layout).present? && invitee_client.client_page_layout.page_publish_status.publication?
          td.link= link_to 'URL', show_user_frontend_reach_client_url(invitee_client.client_page_layout.url_name), target: 'blank'
        - else
          td= '非公開'
        td= l invitation.approved_at
        td= l invitation.first_published_at
        td= invitation.payment_flag ? '支払済' : '未払い'
        td
           = link_to '支払済', backend_reach_invitation_path(invitation, payment_flag: true), method: :put,
                   class: 'btn btn-danger form-control', 'data-confirm' => '本当に支払済にしますか？'
           .button-margin
           = link_to '未払い', backend_reach_invitation_path(invitation, payment_flag: false), method: :put,
                   class: 'btn btn-info form-control', 'data-confirm' => '本当に未払いにしますか？'