Demo error

got an error when i clicked on images on the github pages demo
```
Uncaught Error: Minified React error #130; visit https://reactjs.org/docs/error-decoder.html?invariant=130&args[]=undefined&args[]= for the full message or use the non-minified dev environment for full errors and additional helpful warnings.
at Tu (index.js:22)
at index.js:22
at Ai (index.js:22)
at Li (index.js:22)
at Ri (index.js:22)
at gl (index.js:22)
at cu (index.js:22)
at lu (index.js:22)
at Zl (index.js:22)
at index.js:22
```