I've selected Dark skin then rebuild and restarted the forum. Now even if I revert to default skin, It's using Dark as default skin. can someone help me with this?

@psytonik 2 core cpu and 2gb ram would be sufficient for +-100 users.

I have installed nodebb-plugin-question-and-answer v0.7.7 on nodebb v1.13.3. but when I post a topic as question, "mark this post as correct answer" is not available. "unsolved" tag is not appearing for topic which is posted as question. Please help me with this.