Error codes ยท National portal upload checks
ICTO003: The filetype is not supported. File type should be ZIP.
Rejects the file LU-CSSF
Official text
The filetype is not supported. File type should be ZIP.
How it appears in feedback
ICTO003 The filetype is not supported. File type should be ZIP.
What triggers it
Wrong archive type (.rar, .7z, folder).
How to fix it
Only .zip is accepted.
Raised by the CSSF eDesk upload step; the file never reaches content analysis.