What version is being used (look at the left-bottom corner of the Window)?
There are no known export issues being reported, so let's take a look...
Please upload the file/s to a free server, such as Google Drive or MS OneDrive, get a shared (public) link, copy the link and paste it here or to me in a Private Message via the mail envelope in the top-right corner of this forum.
Using Google Drive, if necessary change "restricted" to "anyone with link can view."