I don't know Solaris, so I'm going to answer this in general.
If you have an answer which is not opinion-based, that's grounds for reopening.
Questions are closed as opinion-based because:
Many good questions generate some degree of opinion based on expert experience, but answers to this question will tend to be almost entirely based on opinions, rather than facts, references, or specific expertise.
and the way to get them reopened is:
Update the question so it can be answered with facts and citations.
(quoting some notices, old and new, that have appeared on such questions across SE).
So, if you or anyone else find an answer which is based on facts and references, rather than just speculation, then that probably means the question is not opinion-based and shouldn't be closed as such.
If you found an answer which is subjectively correct but satisfies you, that's not enough.
It's not clear from your meta post whether the answer proposed in comments is something you've realised is the correct answer, and can be solidly argued as such, or if it's an opinion which has successfully convinced you to share the same view. In the latter case, it would not be enough for reopening the question.
Note that some subjectivity is allowed. This is mentioned in the help centre, distilled down from the old blog post on Good Subjective:
Some subjective questions are allowed, but “subjective” does not mean “anything goes”. All subjective questions are expected to be constructive. What does that mean? Constructive subjective questions:
- inspire answers that explain “why” and “how”
- tend to have long, not short, answers
- have a constructive, fair, and impartial tone
- invite sharing experiences over opinions
- insist that opinion be backed up with facts and references
- are more than just mindless social fun
So, if you have a good answer that justifies itself properly with facts and quotes and solid arguments, then the question should be reopened. But if it's just an idea in a comment which was enough to convince you personally, then probably not.