Object is of type 'unknown'. TS2571

[Uffi64]

Just installed it like described.

After

npm run start

I get this as well on the console as well as on in the browser.

/root/public-phoenix-web/src/web/pages/challenge/Challenge.tsx
TypeScript error in /root/public-phoenix-web/src/web/pages/challenge/Challenge.tsx(70,46):
Object is of type 'unknown'.  TS2571

    68 |     const {location, history} = this.props;
    69 | 
  > 70 |     if (!_.isNil(location.state) && !_.isNil(location.state.challengeId)) {
       |                                              ^
    71 |       const {challengeId} = location.state;
    72 | 
    73 |       challengeState.fetchChallenge({id: challengeId}).then(response => {

Any hints on that?

thx
Uffi