When one of my characters is a Variant Human, I get this in the race sheet. 

TypeError: Cannot read property 'enforceFeatRules' of undefined at https://www.dndbeyond.com/Content/1-0-589-0/React/CharacterTools/dist/characterBuilder.bundle.min.js:50:422584 at Array.filter (<anonymous>) at https://www.dndbeyond.com/Content/1-0-589-0/React/CharacterTools/dist/characterBuilder.bundle.min.js:50:422544 at Array.map (<anonymous>) at t.value (https://www.dndbeyond.com/Content/1-0-589-0/React/CharacterTools/dist/characterBuilder.bundle.min.js:50:422413) at f (https://www.dndbeyond.com/Content/1-0-589-0/React/CharacterTools/dist/characterBuilder.bundle.min.js:31:33621) at beginWork (https://www.dndbeyond.com/Content/1-0-589-0/React/CharacterTools/dist/characterBuilder.bundle.min.js:31:37062) at o (https://www.dndbeyond.com/Content/1-0-589-0/React/CharacterTools/dist/characterBuilder.bundle.min.js:31:53322) at i (https://www.dndbeyond.com/Content/1-0-589-0/React/CharacterTools/dist/characterBuilder.bundle.min.js:31:53595) at b (https://www.dndbeyond.com/Content/1-0-589-0/React/CharacterTools/dist/characterBuilder.bundle.min.js:31:56544)

Then I get thos text in a different box.

in t

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in div

in n

in Connect(n)

in t

in t

in t

in div

in div

in t

in t

in div

in t

in Connect(t)

in t

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in n

Also happened to me. Seems consistent after selecting the human varient when using the character builder.

I get the same error, specifically for variant human characters.

I am getting the same as well.  Used the human varient and tried with both the Feat and Multi Class prerequisites turned on and off

Getting that bug as well with Variant Human selection.