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AdminApp: Edit Image in Long Text Field of Dynamic Item is not working when image used from S3 Blob Storage

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Article Number000094336
EnvironmentProduct: Sitefinity
Version: 10.x, 11.x, 12.x
OS: All supported OS versions
Database: All supported Microsoft SQL Server versions
Question/Problem Description
Edit Image option for dynamic item's long text field on the AdminApp is not working when the image library is set to S3 Blob Storage (e.g. AWS/Azure S3 Blob Storage).
Steps to Reproduce1. Configure Azure S3 Storage Provider for libraries as shown here:
2. Restart website.
3. Create a library using Azure S3 Blob Storage Provider created in Step1.
4. Upload an Image as part of a news item content to the S3 Blob Storage library created in Step3.
5. Click on the uploaded image at the news editor, it will pop-up the options and from there click on "Edit Image" option.

As a result, instead of open up the image editor, it throws the error (see Error Message section) on the browser console.
Clarifying Information
Error MessageOn the Browser Console:

app.be82abc013ae024e4e18.bundle.js:1 Uncaught (in promise): Response with status: 400 Bad Request for URL: domain/sf/system/images/sfthumbnails?
Error: Uncaught (in promise): Response with status: 400 Bad Request for URL: domain/sf/system/images/sfthumbnails?
at C (domain/adminapp/vendors.73c3e7af91de2fb2bdd0.bundle.js:1:1495442)
at C (domain/adminapp/vendors.73c3e7af91de2fb2bdd0.bundle.js:1:1495039)
at domain/adminapp/vendors.73c3e7af91de2fb2bdd0.bundle.js:1:1496172
at t.invokeTask (domain/adminapp/vendors.73c3e7af91de2fb2bdd0.bundle.js:1:1490537)
at Object.onInvokeTask (domain/adminapp/app.be82abc013ae024e4e18.bundle.js:1:167032)
at t.invokeTask (domain/adminapp/vendors.73c3e7af91de2fb2bdd0.bundle.js:1:1490458)
at e.runTask domain/adminapp/vendors.73c3e7af91de2fb2bdd0.bundle.js:1:1485711)
at v (domain/adminapp/vendors.73c3e7af91de2fb2bdd0.bundle.js:1:1492786)
at e.invokeTask [as invoke] (domain/adminapp/vendors.73c3e7af91de2fb2bdd0.bundle.js:1:1491680)
at g (domain/adminapp/vendors.73c3e7af91de2fb2bdd0.bundle.js:1:1502345)
Defect/Enhancement NumberBug 259611
For more information about Bug 259611, see
None at this time.
To change the image at the Long Text field of the dynamic item, delete the old image and add the new image manually.
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Last Modified Date7/31/2019 8:05 AM