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The response is not a valid JSON response when uploading images via Gutenberg in IIS #12532
Describe the bug
referenced this issue
Dec 6, 2018
For what it's worth, I'm running a server with Microsoft-IIS/7.5 with PHP 7.1.13.
Creating a reusable block and or uploading an image results in the same error.
The reusable block posts the error at the top of the page while the image posts the error within the image block upload area.
Although the error appears a reusable block is created and the image is uploaded to the media library.
I wasn't able to recreate this conflict on a LAMP server or in Desktop Server on Windows