For what it’s worth, I discovered that the root cause of this error was not migrating the components from where they lived in v3 to the new v4 location. I ran the codemods, but it seemed to do only a very partial job, which of course, means that you need to go through everything manually anyway to see what it missed. I’d recommend not using any of the available “migration scripts” and just hacking away at the thing manually if you really want to make sure you got everything.
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