There was an error uploading the file appointments.json: Invalid file format

I have the same Problem with .js files. Some are working and some are not. Filesize makes no difference here. :-/

This fix worked for me, thank you!

This is still an issue and as is pointed out in issue #727 on the python client repo (sorry it won’t let me add a link) if the file is less than 1kb the API will not accept valid JSON but it will accept invalid JSON.

For larger files, valid JSON uploads correctly.

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For me, the file size was the issue. The error made no sense, and I ended up spending quite some time to figure this out.

I saw the same error with a very simple json:
{“email”:“sdf”,“name”:“essd”,“address”:“sdf”}

It worked for me when I replaced " with ’
{‘email’:‘sdf’,‘name’:‘essd’,‘address’:‘sdf’}