PNG file upload causes continuous loading in the Knowledge Section and cannot be deleted.

[shweta8996]

Steps to Reproduce:
Issue 1: Continuous Spinning on PNG Upload in Knowledge Section

• Navigate to the Knowledge Section.
• Click Upload File and select a PNG image.
• Observe that the upload process never completes, and a continuous spinning icon appears.

Issue 2: Slow Upload & Unable to Delete in Chatbot Section

• Navigate to the Chatbot Section.
• Upload a PNG file and observe that the upload takes a very long time.
• Try to delete the uploaded file and observe that the delete button does not work.

Expected Result:
If PNG file format is not supported, a clear message should be displayed (e.g., "PNG format is not supported. Please upload a valid file format.").
The file upload should fail immediately instead of continuously spinning.
If the PNG file is successfully uploaded, it should be deletable from the chatbot section.

Actual Result:
PNG file keeps loading indefinitely in the Knowledge Section.
In the Chatbot Section, the upload is extremely slow and deleting the file is not possible.

Please refer attachment:

Recording.75.mp4