Hi Miguel,
A few notes:
1) You can actually add images to your post, and alternatively add them as an attachment, so no need to put them on postimg.org.
2) You don't "publish [extensions] to Service Studio" - Service Studio is the tool with which you create eSpaces. You publish the extensions with Integration Studio, to the Platform.
3) The warning says it all: you are trying to create an extension in Java, while your platform server runs .NET! Of course this isn't possible. Java and .NET are not interchangeable. Are you using the Personal Edition of the platform? Personal Editions are .NET only. You cannot use Java with a Personal Edition.
A few notes:
1) You can actually add images to your post, and alternatively add them as an attachment, so no need to put them on postimg.org.
2) You don't "publish [extensions] to Service Studio" - Service Studio is the tool with which you create eSpaces. You publish the extensions with Integration Studio, to the Platform.
3) The warning says it all: you are trying to create an extension in Java, while your platform server runs .NET! Of course this isn't possible. Java and .NET are not interchangeable. Are you using the Personal Edition of the platform? Personal Editions are .NET only. You cannot use Java with a Personal Edition.