Run timer error

[JacquesBonet]

When I launch cra-page-builder, I get tis error

./node_modules/slate-plain-serializer/lib/slate-plain-serializer.es.js
Attempted import error: 'Block' is not exported from 'slate'.

[AlbionaHoti]

@JacquesBonet can you give us more context on where you've encountered this, one in our Community Slack?