Unable to submit screenshots for review to Appstore Connect

I am trying to upload screenshots from my iPhone 7 (4.7 inch screen) to the media manager for app review. The dimensions are 750X1334 and the file's colour space is also RGB.

I am able to upload one image successfully, but as soon as I try to upload the second one, or reload the page, I always get the message:

"One or more screenshots aren't in the RGB color space."

The file information are:

Dimensions: 750 × 1334
Colour space: RGB
Colour profile: P3

Hello, if I get a similar error, I do the following:

Step One: Export image in .jpg format OR Export for Web.

Step Two: Remove All website data.

I go back to the account, and there are no more errors.

Unable to submit screenshots for review to Appstore Connect
 
 
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