Can’t Add Atributes ina New Product.

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Hello, I am trying to add a New Product, but the Attributes section does not work. I select any of the possible attributes in the dropdown, click Add and they are not added.
Save Draft and Update don’t work either.
Publish only works if nothing is changed inside the Publish block. If any of the options are changed, Publish no longer works.
This is happening since I updated to version 6.4.0