I am trying to add an Excel file as an attachment to a post and am getting the Invalid file error. I have done this before and it worked, so not sure why I am getting the error now. I would also like to attach a Numbers (MacOS) spreadsheet.
Invalid File error uploading .xlsx file
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Hi,
I am attempting to attach a .mobi file type (Kindle book) to a post. I receive the following error. In the Attachment manager I had already added this file type, and successfully added...-
Channel: Support Issues & Questions
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