Questions & Answers about Jag var inte medveten om det där problemet.
Why do we use om instead of av for 'of' in this sentence?
The adjective medveten (aware) is almost always paired with the preposition om. While the English word 'of' often translates to av, adjective-preposition collocations rarely translate word-for-word. You just have to memorize medveten om as a set phrase!
Why does problem have the definite ending -et if we are already saying 'that problem'?
Swedish uses a 'double definite' structure with pointing words like det där (that) and det här (this). When you use them, the noun that follows must also be in its definite form. So you are literally saying 'that there the-problem' (det där problemet).
How would the sentence change if the subject was 'we' (vi) instead of 'I' (jag)?
The adjective medveten must agree with the subject. Because 'we' is plural, you would need to use the plural form medvetna, making the sentence: Vi var inte medvetna om det där problemet.
Is it possible to just say det problemet instead of det där problemet?
Yes, but adding där makes it perfectly clear that you mean 'that problem' and not just 'the problem'. In everyday spoken Swedish, using det där (or den där for en-words) is the most standard way to single something out.