The Procedure Entry Point Steaminternal-createinterface Could Not Be Located In The Dynamic Library -

Sometimes, a simple reboot can resolve the issue by ensuring that all services and applications are properly restarted.

If the error occurs only when launching a specific game: Sometimes, a simple reboot can resolve the issue

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Another user had Steam installed on an SSD (C:) but their game library on an HDD (D:). A Windows Update caused the D: drive to temporarily disconnect. Steam tried to update the game but failed, corrupting the API file. Solution: Running “Verify integrity of game files” fixed it. Another user had Steam installed on an SSD