I was having this error and it turned out to be that I was unintentionally including an Object in my JSX code that I had expected to be a string value:
return (
<BreadcrumbItem href={routeString}>
{breadcrumbElement}
</BreadcrumbItem>
)
breadcrumbElement
used to be a string but due to a refactor had become an Object. Unfortunately, React’s error message didn’t do a good job in pointing me to the line where the problem existed. I had to follow my stack trace all the way back up until I recognized the “props” being passed into a component and then I found the offending code.
You’ll need to either reference a property of the object that is a string value or convert the Object to a string representation that is desirable. One option might be JSON.stringify
if you actually want to see the contents of the Object.