Identify the empty TQA elements and remove them from the file in a text editor like Notepad++.
You can use the Regex:
sdl:revid="[0-9a-fA-F\-]{32,36}"(\s\/|\/)>
to find such entries.
An example of an empty entry is:
<mrk mtype="x-sdl-feedback-deleted" sdl:revid="ec652a77-4821-48b2-bb0c-a0e8cdc8b5f9"/>