FME uses three colors to indicate potential issues:
- Green - no issue detected, this should work
- Yellow - potentially an issue, it may not work
- Red - definitely an issue, it will not work
In your screenshot you see a lot of yellow and red on the attributes. Red occurs in the output feature types, for example igds_class on feature type 19. It's red because that attribute is not going to be filled by anything. Whether or not this is a big problem is something you can probably better determine than I. Similarly for the yellow ones, you see those on the transformer and they're yellow because they're not connected to anything downstream. This may be because it's designed that way (in which case it's no problem) or because there's something wrong. Again, you'd need to know about the data itself to be able to determine if this is a problem or not.
On a side note, and I understand you were not the one who designed this workspace, but renaming transformers, as is done here, is something I'm not a fan of. I have no idea what the Level 18, Level 19 etc. transformers are. It makes it harder to understand the workspace (especially if it's not documented)