Download link doesn’t sent

Hello,
I’ve a problem customers only get 1 email that contain the information about order but they don’t get the other email that contain the download link.
The only email customers get is this email below:

Thanks for your order. It’s on-hold until we confirm that payment has been received. In the meantime, here’s a reminder of what you ordered:

I followed woocommerce docs instructions and added this function to “functions.php” file:

add_action( ‘woocommerce_thankyou’, ‘custom_woocommerce_auto_complete_order’ );
function custom_woocommerce_auto_complete_order( $order_id ) {
if ( ! $order_id ) {
return;
}

$order = wc_get_order( $order_id );
$order->update_status( ‘completed’ );
}

The order auto completed just fine but costumers don’t get the confirmation email.
my woocommerce version is 4.2.2
WordPress version is 5.5.3

System Report:

### WordPress Environment ###

WordPress address (URL): https://tebooks.net
Site address (URL): https://tebooks.net
WC Version: 4.2.2
REST API Version: ✔ 1.0.8
WC Blocks Version: ✔ 2.5.16
Action Scheduler Version: ✔ 3.1.6
WC Admin Version: ✔ 1.2.4
Log Directory Writable: ✔
WP Version: 5.5.3
WP Multisite: –
WP Memory Limit: 2 GB
WP Debug Mode: –
WP Cron: ✔
Language: en_US
External object cache: –

### Server Environment ###

Server Info: Apache
PHP Version: 7.4.11
PHP Post Max Size: 2 GB
PHP Time Limit: 500
PHP Max Input Vars: 1000
cURL Version: 7.73.0
OpenSSL/1.1.1h

SUHOSIN Installed: –
MySQL Version: 5.6.41-84.1
Max Upload Size: 1 GB
Default Timezone is UTC: ✔
fsockopen/cURL: ✔
SoapClient: ✔
DOMDocument: ✔
GZip: ✔
Multibyte String: ✔
Remote Post: ✔
Remote Get: ✔

### Database ###

WC Database Version: 4.6.2
WC Database Prefix: TE_
Total Database Size: 63.88MB
Database Data Size: 36.73MB
Database Index Size: 27.15MB
TE_woocommerce_sessions: Data: 1.02MB + Index: 0.02MB + Engine InnoDB
TE_woocommerce_api_keys: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
TE_woocommerce_attribute_taxonomies: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
TE_woocommerce_downloadable_product_permissions: Data: 0.20MB + Index: 0.41MB + Engine InnoDB
TE_woocommerce_order_items: Data: 0.33MB + Index: 0.09MB + Engine InnoDB
TE_woocommerce_order_itemmeta: Data: 2.11MB + Index: 2.72MB + Engine InnoDB
TE_woocommerce_tax_rates: Data: 0.02MB + Index: 0.06MB + Engine InnoDB
TE_woocommerce_tax_rate_locations: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
TE_woocommerce_shipping_zones: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
TE_woocommerce_shipping_zone_locations: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
TE_woocommerce_shipping_zone_methods: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
TE_woocommerce_payment_tokens: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
TE_woocommerce_payment_tokenmeta: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
TE_woocommerce_log: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
TE_actionscheduler_actions: Data: 3.02MB + Index: 1.38MB + Engine InnoDB
TE_actionscheduler_claims: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
TE_actionscheduler_groups: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
TE_actionscheduler_logs: Data: 2.02MB + Index: 1.53MB + Engine InnoDB
TE_commentmeta: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
TE_comments: Data: 1.25MB + Index: 0.67MB + Engine InnoDB
TE_ewd_uwpm_email_links_clicked_events: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
TE_ewd_uwpm_email_only_users: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
TE_ewd_uwpm_email_open_events: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
TE_ewd_uwpm_email_send_events: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
TE_links: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
TE_options: Data: 2.02MB + Index: 0.14MB + Engine InnoDB
TE_postmeta: Data: 14.52MB + Index: 12.86MB + Engine InnoDB
TE_posts: Data: 5.48MB + Index: 1.03MB + Engine InnoDB
TE_termmeta: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
TE_terms: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
TE_term_relationships: Data: 0.14MB + Index: 0.11MB + Engine InnoDB
TE_term_taxonomy: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
TE_usermeta: Data: 2.50MB + Index: 3.91MB + Engine InnoDB
TE_users: Data: 0.20MB + Index: 0.23MB + Engine InnoDB
TE_wc_admin_notes: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
TE_wc_admin_note_actions: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
TE_wc_category_lookup: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
TE_wc_customer_lookup: Data: 0.27MB + Index: 0.22MB + Engine InnoDB
TE_wc_download_log: Data: 0.30MB + Index: 0.27MB + Engine InnoDB
TE_wc_order_coupon_lookup: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
TE_wc_order_product_lookup: Data: 0.33MB + Index: 0.38MB + Engine InnoDB
TE_wc_order_stats: Data: 0.30MB + Index: 0.31MB + Engine InnoDB
TE_wc_order_tax_lookup: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
TE_wc_product_meta_lookup: Data: 0.14MB + Index: 0.33MB + Engine InnoDB
TE_wc_reserved_stock: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
TE_wc_tax_rate_classes: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
TE_wc_webhooks: Data: 0.02MB + Index: 0.02MB + Engine InnoDB

### Post Type Counts ###

attachment: 1305
page: 8
post: 1
product: 1222
revision: 21
shop_order: 2796
shop_order_refund: 8
uwpm_mail_template: 1

### Security ###

Secure connection (HTTPS): ✔
Hide errors from visitors: ✔

### Active Plugins (5) ###

Exclude Pages From Menu: by Vinod Dalvi – 2.0
Google Ads for WooCommerce: by Kliken – 1.0.4 – Installed version not tested with active version of WooCommerce 4.2.2
Really Simple SSL: by Really Simple Plugins – 3.3.5
Increase Maximum Upload File Size: by Imagify – 2.0.4
WooCommerce: by Automattic – 4.2.2 (update to version 4.6.2 is available)

### Inactive Plugins (3) ###

Akismet Anti-Spam: by Automattic – 4.1.6
Hello Dolly: by Matt Mullenweg – 1.7.2
Ultimate WP Mail: by Etoile Web Design – 0.23

### Must Use Plugins (1) ###

SSO: by Garth Mortensen
Mike Hansen – 0.3

### Settings ###

API Enabled: –
Force SSL: –
Currency: USD ($)
Currency Position: left
Thousand Separator: ,
Decimal Separator: .
Number of Decimals: 2
Taxonomies: Product Types: external (external)
grouped (grouped)
simple (simple)
variable (variable)

Taxonomies: Product Visibility: exclude-from-catalog (exclude-from-catalog)
exclude-from-search (exclude-from-search)
featured (featured)
outofstock (outofstock)
rated-1 (rated-1)
rated-2 (rated-2)
rated-3 (rated-3)
rated-4 (rated-4)
rated-5 (rated-5)

Connected to WooCommerce.com: –

### WC Pages ###

Shop base: #7 - /
Cart: #8 - /cart/
Checkout: #9 - /checkout/
My account: #10 - /my-account/
Terms and conditions: ❌ Page not set

### Theme ###

Name: Storefront
Version: 2.7.0 (update to version 2.8.0 is available)
Author URL: https://woocommerce.com/
Child Theme: ❌ – If you are modifying WooCommerce on a parent theme that you did not build personally we recommend using a child theme. See: How to create a child theme
WooCommerce Support: ✔

### Templates ###

Overrides: –

### Action Scheduler ###

Complete: 6,249
Oldest: 2020-10-09 12:06:55 +0000
Newest: 2020-11-09 11:34:00 +0000

The order status is automatically completed and still the emails that contain the download link are not sent.
Even when I change the status to “Processing” or “Completed” there is no message sent.
“Processing Order” and “Order Completed” emails are enabled.

Please help.
Thank you.