not recieving voucher

I cannot get a voucher in the email. I am using desktopserver on you version 3.17. I add the voucher then save the page . Then i check voucher csv button checkbox checked after entering email address. Then click send button receive email but no attachment.

Wordpress
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Home Url: http://smo.dev.cc
Site Url: http://smo.dev.cc
Version: 4.9.4
Debug Mode: No
Locale: en_US
Multisite: No
Page For Posts: Blog (#212)
Page On Front: Home (#110)
Permalink Structure: /%postname%/
Show On Front: page
Wp Cron: Yes

Settings
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Version: 3.17.0
Db Version: 3.17.0
Course Catalog: Course Catalog (#837)
Course Catalog Per Page: 9
Course Catalog Sorting: menu_order,ASC
Membership Catalog: Membership Catalog (#838)
Membership Catalog Per Page: 9
Membership Catalog Sorting: menu_order,ASC
Site Membership: Not Set
Student Dashboard: My Courses (#840)
Courses Endpoint: my-courses
Edit Endpoint: edit-account
Lost Password Endpoint: lost-password
Vouchers Endpoint: redeem-voucher
Autogenerate Username: yes
Password Strength Meter: no
Minimum Password Strength: medium
Terms Required: yes
Terms Page: Terms of Use (#501)
Checkout Names: required
Checkout Address: hidden
Checkout Phone: hidden
Checkout Email Confirmation: yes
Open Registration: yes
Registration Names: required
Registration Address: hidden
Registration Phone: hidden
Registration Voucher: optional
Registration Email Confirmation: yes
Account Names: required
Account Address: hidden
Account Phone: hidden
Account Email Confirmation: yes
Checkout Page: Purchase (#839)
Confirmation Endpoint: confirm-payment
Force Ssl Checkout: yes
Country: US
Currency: USD
Currency Position: left
Thousand Separator: ,
Decimal Separator: .
Decimals: 2
Trim Zero Decimals: no
Recurring Payments: yes
Email From Address: jfwagner@verizon.net
Email From Name: Social Media Option
Email Footer Text:
Email Header Image: 786
Cert Bg Width: 800
Cert Bg Height: 616
Cert Legacy Compat: no

Gateways
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Manual: Enabled
Manual Logging: no
Manual Order: 1

Server
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Mysql Version: 5.6.24
Php Curl: Yes
Php Default Timezone: UTC
Php Fsockopen: Yes
Php Max Input Vars: 5000
Php Max Upload Size: 512 MB
Php Memory Limit: 512M
Php Post Max Size: 512M
Php Soap: Yes
Php Suhosin: No
Php Time Limt: 300
Php Version: 5.5.24
Software: Apache/2.4.12 (Win32) OpenSSL/1.0.1l PHP/5.5.24
Wp Memory Limit: 40M

Browser
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HTTP USER AGENT: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:59.0) Gecko/20100101 Firefox/59.0

Theme
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Name: Astra Child
Version: 1.1.6.1516675236
Themeuri: http://wpastra.com/
Authoruri: http://wpastra.com/about/
Template: astra
Child Theme: Yes
Llms Support: No

Plugins
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All-in-One WP Migration: 6.65
Astra Pro: 1.2.3
Child Theme Configurator: 2.2.9
Customizer Search: 1.1.2
Featured Video Plus: 2.3.3
Import Docx: 9.1.1.0
LifterLMS: 3.17.0
MalCare – Pro: 1.52
NextScripts: Social Networks Auto-Poster: 4.1.7
Really Simple SSL: 2.5.26
ShortPixel Image Optimizer: 4.10.3
Simple Sitemap: 2.4
Subscribe2: 10.22.1
Thrive Architect: 2.0.28
Thrive Comments: 1.0.9
Thrive Leads: 2.0.29
UpdraftPlus – Backup/Restore: 2.14.4.22
WordPress Comments Import & Export: 2.0.4
WordPress Importer: 0.6.4
WP-Optimize: 2.2.2
WP Freshstart 4: 4.6
WP Mail SMTP: 1.2.5
Yoast SEO: 7.1

Integrations
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BbPress: No
BuddyPress: No

Template Overrides
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The page I need help with: [log in to see the link]