Always getting "The icon must only use black and should contain an alpha channel."

### Environment SaaS (https://sentry.io/) ### Steps to Reproduce 1. Go to an internal integration ([example](https://shopee-d1.sentry.io/settings/developer-settings/kenrick-testing-integration-bc451a/)) 2. Upload an image at Small Icon 3. Save Avatar --- I tried several simple images too, but always failed. When I tried the previously successfully uploaded image from my other [internal integration](https://shopee-d1.sentry.io/settings/developer-settings/shopee-mattermost-alerts-0e5b48/), it also failed this time. Some images tried:    --> this was used at other integration but failed when used in a new integration P.S. Those images are exported from Figma. Pretty sure it only contains black color & alpha channel.  ### Expected Result Image saved ### Actual Result Failed with "The icon must only use black and  should contain an alpha channel." ### Product Area Settings - Integrations ### Link https://shopee-d1.sentry.io/settings/developer-settings/kenrick-testing-integration-bc451a/ ### DSN _No response_ ### Version _No response_