Make sure that the Mime Type for xliff and xlf files is present in the Mime Type table. Go to the
Management > Administration > Customization page and select
Mime Types.
If present, you should find it as
text/xliff Mime Type. If you are submitting files in both XLIFF and XLF format/file extensions, make sure that both extensions are added to the
text/xliff Mime Type. If the xliff extension is not added, type it in the
Extensions field and click on
Add. This is how the Mime Type should look like: