[meta] Collection of frequent errors and their solutions

[marktani]

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This is a collection of frequent errors and their solutions. This should be included in the README if we collected a few.

• Invariant Violation error.

  • rebuild the project

  Usually when you changed your data schema (added models or fields) you’ll need to rebuild the project. The reason is that it needs to pull in the new data schema at compile time. The hot module reloading wouldn’t handle that.

  • clear cache

  rm -rf node_modules
  

  • clear watchman cache, if you're using it

  rm -rf $TMPDIR/react-*
  watchman watch-del-all