Failed to execute 'createObjectURL' on 'URL': Overload resolution failed

[packaaa]

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[Techn1x]

I've encountered this error as well - It occurs when URL.createObjectURL() receives something other than a File/Blob etc.

In my case, there was a bug in Pretender.js, where fetch() requests for binary files (eg images) via pretender passthrough would incorrectly return String instead of Blob. Do you happen to be using pretender.js?
pretenderjs/pretender#363