That does not look good. It could be fungus/mould but looks like lens separation to me (or both). The only thing would be taking it apart, cleaning and reglueing... It is doable but not a trivial job.
It may be out of warranty but I would still contact the dealer and you may be lucky?
Also, check your other eyepieces, although I would be surprised if they were affected. It is usually age related or a fault.
Andrew
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