What’s Wrong With My Night Blooming Cereus?

Question

The Stamms have started to grow this tan overlay tips of the leaves seem as though they’re burnt and some of the thick leaves are becoming limp instead of thick and hard help this plant was thriving and all of a sudden has stopped thriving.

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Answer 1

It looks like a pest is on the plant stems, possibly scale. Here is how to help:
https://www.missouribotanicalgarden.org/gardens-gardening/your-garden/help-for-the-home-gardener/advice-tips-resources/pests-and-problems/insects/mealybugs/insect-pests-of-cacti-and-succulents.aspx

https://www.gardeningknowhow.com/ornamental/cacti-succulents/night-blooming-cereus/night-blooming-cereus.htm