Using Multisite Network with Ionos/1und1 Webhoster

Hi all,
I am trying to setup a multisite network and added the following to wp-config.php (leaving out the .htaccess settings for now) according to the message in “Tools -> Network settings” settings

define(‘WP_ALLOW_MULTISITE’, true);
define(‘SUBDOMAIN_INSTALL’, true);
define(‘DOMAIN_CURRENT_SITE’, ‘aequum.de’);
define(‘PATH_CURRENT_SITE’, ‘/’);
define(‘SITE_ID_CURRENT_SITE’, 1);
define(‘BLOG_ID_CURRENT_SITE’, 1);

This led to the following error:

“Error establishing a database connection”

What could be the problem? (Info: I cannot create wildcard subdomains with Ionos Hosting since they do not allow special characters such as “*”)

After having tried to repair the DB I got the following message:

TxbLv1_posts: Table ‘db812988677.TxbLv1_posts’ doesn’t exist
TxbLv1_comments: Table ‘db812988677.TxbLv1_comments’ doesn’t exist
TxbLv1_links: Table ‘db812988677.TxbLv1_links’ doesn’t exist
TxbLv1_options: Table ‘db812988677.TxbLv1_options’ doesn’t exist
TxbLv1_postmeta: Table ‘db812988677.TxbLv1_postmeta’ doesn’t exist
TxbLv1_terms: Table ‘db812988677.TxbLv1_terms’ doesn’t exist
TxbLv1_term_taxonomy: Table ‘db812988677.TxbLv1_term_taxonomy’ doesn’t exist
TxbLv1_term_relationships: Table ‘db812988677.TxbLv1_term_relationships’ doesn’t exist
TxbLv1_termmeta: Table ‘db812988677.TxbLv1_termmeta’ doesn’t exist
TxbLv1_commentmeta: Table ‘db812988677.TxbLv1_commentmeta’ doesn’t exist

Thanks for helping out!

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