when add domain or modify the properties of a domain services i-MSCP not restart, I noticed that in mysql that is not recognized ip assigned, it returns the value as NUL, I report image error of the panel.
This error does not allow me to do any updates now (since even the current time) because the domains remain blocked until it would modify the mysql.
OS: debian
I-MSCP : 1.1.0
You have very much Problems with your Server its not normal... Better to make a fresh installation or maybe a reconfiguration or update do actual version.
And also you offer Webservice.... 
cosa nostra
You should check the database, specially the relations for the IPs id. I bet some IP id for your domains or resellers are not longer available in the server_ips table. In such case, you must fix them manually in the database.
You have very much Problems with your Server its not normal... Better to make a fresh installation or maybe a reconfiguration or update do actual version.
And also you offer Webservice....
problems derived from the server in a company that I have acquired, I will not say the other problems that I found in the management of domains,the other servers do not have all these problems, if not every time the spam ...