I don't think you can put WordPress and Q2A on the same path. At least not without some tricky and most likely very error-prone URL rewriting. Just put Q2A in a subdirectory (e.g. "qa") of your WordPress site as documented. Your WordPress would be on https://example.org/ and your Q2A on https://example.org/qa/, so questions could be accessed like https://example.org/qa/212/question-1.
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