I'm getting the following error when I try to click on the Spells tab on my character sheet.

TypeError: Cannot read property 'push' of undefined
    at https://www.dndbeyond.com/Content/1-0-428-0/React/CharacterTools/dist/characterSheet.bundle.min.js:1:47923
    at Array.forEach (<anonymous>)
    at https://www.dndbeyond.com/Content/1-0-428-0/React/CharacterTools/dist/characterSheet.bundle.min.js:1:47669
    at https://www.dndbeyond.com/Content/1-0-428-0/React/CharacterTools/dist/characterSheet.bundle.min.js:1:280933
    at https://www.dndbeyond.com/Content/1-0-428-0/React/CharacterTools/dist/characterSheet.bundle.min.js:1:280360
    at https://www.dndbeyond.com/Content/1-0-428-0/React/CharacterTools/dist/characterSheet.bundle.min.js:1:281063
    at Object.getLevelSpells (https://www.dndbeyond.com/Content/1-0-428-0/React/CharacterTools/dist/characterSheet.bundle.min.js:1:280360)
    at Function.c [as mapToProps] (https://www.dndbeyond.com/Content/1-0-428-0/React/CharacterTools/dist/characterSheet.bundle.min.js:44:241348)
    at r (https://www.dndbeyond.com/Content/1-0-428-0/React/CharacterTools/dist/characterSheet.bundle.min.js:6:165155)
    at Function.r.mapToProps (https://www.dndbeyond.com/Content/1-0-428-0/React/CharacterTools/dist/characterSheet.bundle.min.js:6:165274)

Check, and eventually delete, homebrew spells and items. Those are usually the cause.

Thanks!