A good way to find out about the toxicity of any plant is to google its Latin name along with the word toxicity. Google reports that the berry is nontoxic but has a somewhat medicinal taste, so some humans don't like it. On the other hand, some people make jelly out of it lol. Here are a couple of links:
https://www.wildflower.org/expert/show.php?id=2971
https://www.chron.com/life/article/Beautyberries-powers-go-beyond-good-looks-3831149.php
https://www.wildflower.org/expert/show.php?id=2971
https://www.chron.com/life/article/Beautyberries-powers-go-beyond-good-looks-3831149.php
