am401

I think the linked suggestion may be feasible depending on your hosting provider and whether you have access to the $_SERVER['HTTP_HOST'] variable or not:

https://myjeeva.com/mapping-multiple-domains-into-single-instance-of-wordpress.html

Alternatively you may be able to configure something on the web server level in ie NGINX/Apache via a proxy pass rule.

It sounds like you may be hitting some limitations with regards to your platforms resource limitations. If you are able to adjust them, this article may assist:

https://www.wpbeginner.com/wp-tutorials/how-to-fix-the-link-you-followed-has-expired-error-in-wordpress/

The above error in this case is for Media uploads, however it would be similar for other functions such as adding themes or creating new sites within a multisite network.

This could also be a potential issue with how your current multisite configuration is setup. You may find the following article helpful in ensuring that the wp-config.php file and the database is configured correct for the primary domain:

https://www.wpbeginner.com/wp-tutorials/how-to-install-and-setup-wordpress-multisite-network/

Depending on whether your hosting provides Geo based features, such as a database, you may be able to leverage that. Alternatively as mentioned you would need a database of sorts that contains the required Geo location information.

An example would be https://www.maxmind.com/en/geoip2-databases >> MaxMind’s GeoLocation database.

Looking at one of the top articles from @t-p ‘s link, reaching out to GoDaddy may be a good first step to getting it resolved. Alternatively you may want to check with a PHP info file if you are able to create one on your hosting platform to see if the relevant mod is enabled or not.