FB Update not working after change of hosting-provider (OAuthException: (#324) Requires upload file))

Hi,

recently I have moved my website to another hosting provider, the old one was closing down.

Before the move everyting within FBAutoPost was setup and working fine. I couldn't test feature prior migrating it, as within the FB-app the SITE URL was fixed to the existing environment (http://www.happy-life.nl/) and not my test-URL.

Now it not working anymore, the error message is:

FBAutopostException: Facebook SDK threw an error: OAuthException: (#324) Requires upload file in FBAutopost->publish() (line 212 of /home/vreulsb1/domains/happy-life.nl/public_html/sites/all/modules/fb_autopost/class/FBAutopost.php).

Drupal: 7.67
FBAutoPost: 7.x-1.4
Libraries: 7.x-2.5
Entity:7.x-1.9
Facebook PHP SDK: 3.2.3
PHP 7.3.6

I've first tried to reconnect the Faceboook Autopost by login into Facebook (admin/config/services/fbautopost --> Login to facebook)
This step unfortunately also failed and I'm receiving the following error (in dutch):

URL kan niet worden geladen: Het domein van deze URL is niet toegevoegd aan de domeinen van deze app. Voeg alle domeinen en subdomeinen van je app toe aan het veld Appdomeinen in de instellingen van je app om deze URL te kunnen laden.

Which basically says the domain from the URL isn't added to the domain from the app. This however is not to case or at least how i read to URL (see pictures).

Whilst the migration the core & modules had to be upgraded.....not sure where to start now.

1.) something wrong with the module (line 212)
2.) the failing connection is preventing the update
3.) some settings within the FBAutoPost (rules) is not right anymore
4.) FacebookApp is indeed wrong and needs additional settings
etc

Really looking forward to get this working again.

p.s.
other error_message which in my opion are a result of the above are, as these error-message appeared only after trying to re-connect to facebook.

- Unable to get variable facebook_publication_id, it is not defined.
- Unable to evaluate action data_set.

Thanks for your help in advance.

Regards,
Bogdan