Welcome to the eazyBI Community!
If you are defining the calculated member in the Project dimension, the syntax should be the following. I suggest using the autofill when starting to type the project name and the component name
Aggregate({
[Project].[PROJECT NAME].[COMOPONENT NAME1],
[Project].[PROJECT NAME].[COMOPONENT NAME2],
[Project].[PROJECT NAME].[COMOPONENT NAME3]
})
Alternatively, I suggest importing Component as a dimension (described in the community post here Dimension Component as filter - #4 by zane.baranovska) which will allow you to create calculated members straight into the Component dimension!
Best wishes,
Elita from support@eazybi.com