My understanding that you are having issues with the Include statement:
You need to do the following:
1. Create a Data Connector (Folder type) pointing to the folder where you will be keeping your include files. In my case the connector was called CommonScripts
2. Create variable for this Data Connector name. For example:
set ScriptsLibrary = 'lib://CommonScripts (main_user)';
3. Adjust your include statement as following and use it for multiple include files:
I would suggest to use a "must_include" statement instead of "include". It will throw the loading error if something happens with the include file..