While exporting the Capella project in RAR format, it was found that only the .project file is present inside the archive. The following essential files are missing: .afm, .aird, and the Capella.
ok, how are you creating your rar file? Unless you are in Capella while doing this, this is very unlikely that Capella has anything to do with this, there is probably an issue un the way you are creating your rar archive.