Could not pull content from connection due to error. API endpoint error.

Describe the bug

Distributor stable Version 2.0.4.

I can establish connection from site X to site Y on a Shared Hosting (Hostinger)

However at Pull Content screen i get this error:

Could not pull content from connection due to error. API endpoint error.

On both of these 2 websites i get the following error (Query Monitor)

Post: https://site.xyz/wp-json/wp/v2/distributor/list-pull-content  (confidential)
500 Internal Server Error
Caller: 
Distributor\ExternalConnections\WordPressExternalConnection->remote_post()
wp-content/plugins/distributor-stable/includes/classes/ExternalConnections/WordPressExternalConnection.php:243
Distributor\ExternalConnections\WordPressExternalConnection->remote_get()
wp-content/plugins/distributor-stable/includes/classes/ExternalConnections/WordPressExternalConnection.php:176
Distributor\PullListTable->prepare_items()
wp-content/plugins/distributor-stable/includes/classes/PullListTable.php:530
Distributor\PullUI\dashboard()
wp-content/plugins/distributor-stable/includes/pull-ui.php:529
do_action('distributor_page_pull')
wp-includes/plugin.php:517 
Component: Plugin: distributor-stable

Besides Distributor everything works fine and fast. Hosting has enough resources. I tried to deactivate other plugins and change theme but it gave no result. Also i switched between various PHP versions (7.4 -> 8.1) and also no luck.

On both sites Rest Api is available :

Steps to Reproduce

Establish connection between sites
Go to Pull Content screen
Use Query Monitor to catch errors

Screenshots, screen recording, code snippet

See Description

Environment information

Env info:

Wordpress: 6.5.4
SSl: yes
Web Server: LiteSpeed
PHP: 8.1.27 (Supports 64bit values)
PHP memory:     2048M
PHP max input variables 5000
PHP time limit  360
Max input time  360
cURL version    7.87.0 OpenSSL/1.1.1w
Extension   mysqli
Server version  10.11.7-MariaDB-cll-lve

WordPress information


Version 6.5.4
Site Language   en_US
User Language   en_US
Timezone    +00:00
Home URL    https://site.xyz
Site URL    https://site.xyz
Permalink structure /%postname%/
Is this site using HTTPS?   Yes
Is this a multisite?    No
Can anyone register on this site?   No
Is this site discouraging search engines?   Yes
Default comment status  Open
Environment type    local
User count  2
Communication with WordPress.org    WordPress.org is reachable

Code of Conduct

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10up / distributor