Thank you for posting your question.
I've checked the records for this version, and despite the fact that we haven't the exact error reproduced, we had similar issues in the past. Unfortunately, I am not sure how the error could be reproduced locally.
Have you made any changes to the search indexers, or do you have any custom functionality related to pages?
I am almost 100% sure that upgrade to at least 3.5 will fix the problem, but please let us know if you have any more details about the issue.
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