When you hear the term source trouble, it means that there is a problem or an issue with where something is coming from. If you are looking for synonyms for this term, there are a few options to consider. You might use the phrase "origin problem" or "root issue" to describe this type of challenge. Other possibilities could include "starting point dilemma," "foundational difficulty," or "beginning hurdle." Ultimately, the choice of synonym will depend on the context and intended meaning of the phrase. By exploring different options, you can find the right term to describe any source trouble you might encounter.