I'm still seeing "I'm neurodivers" a lot, especially with Germans. Here is a short explanation.
A group can be divers. Like people or populations of animals or all living things on the planet (biodiversity).
One person/cat/plant/... can be divergent, when it is, in some way, different from a given (constructed) norm. It's not like the others.
If you want to read more about it, here is a more extensive explanation http://neurocosmopolitanism.com/neurodiversity-some-basic-terms-definitions/
(You add the missing e to neurodiverse yourself please 👾 )