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Viewer issue - unknown file format. 2021-11-16t16:23:06.105z by ekinhazal1

8a485735-2f5d-4b4a-8763-1a0c78978be6/MARINE TOURISM_1-2.pptx

Originated From: https://api.groupdocs.app/viewer/v1/viewer/loadDocumentDescription
User URL: https://products.groupdocs.app/viewer/view?file=8a485735-2f5d-4b4a-8763-1a0c78978be6/MARINE%20TOURISM_1-2.pptx
Exception: Unknown file format.
InnerException: Could not read block - no data! (position 0x00438691)

Could you please share a problematic file? As we cannot reproduce this issue using sample Presentation.