Connect to the server via SSH

Create Plesk database backup

Find the affecting domain using ID from error message:

# plesk db "SELECT ipCollectionId, name FROM DomainServices JOIN domains ON dom_id = domains.id WHERE ipCollectionId = 101"
+-----------------+----------------+
| ipCollectionId | name |
+-----------------+----------------+
| 101 | example.com |
+-----------------+----------------+

Find the IP address that should be used for the domain:

# grep listen /var/www/vhosts/system/example.com/conf/nginx.conf
listen 203.0.113.2:443 ssl http2;
listen 203.0.113.2:80;

Find the ID of the IP address to be used:

# plesk db "SELECT id, ip_address FROM IP_Addresses WHERE ip_address = '203.0.113.2'"
+-----+--------------+
| id | ip_address |
+-------+------------+
| 1 | 203.0.113.2 |
+-----+--------------+

Insert a record for the IP address from step 3 using ID from the error message and step 5.:

# plesk db "insert into IpAddressesCollections values(101, 1)"

Repair broken configuration files:

# plesk repair web -y