[JS, React] Support for the experimental syntax 'classProperties' isn't currently enabled

I get the error:

Support for the experimental syntax ‘classProperties’ isn’t currently enabled

If I use the latest sdk version 1.7.0 in my react app. It works fine if I use 1.6.2
The error comes up just on importing the sdk only

npm: ‘6.14.7’
node: ‘12.16.0’
react: 16.13.1

The error is coming from with the sdk.

Can you provide a minimal example with the issue or exact steps to reproduce this error?

I have posted it with more details at