Add message error when we can't save as empty name

2 jobs for master in 8 minutes and 39 seconds (queued for 86 minutes and 17 seconds)
Status Name Job ID Coverage
  Build
failed build_clazy_clang_tidy #96541

00:04:32

passed linux kf5-qt5 qt5.15 #96540

00:04:06

76.0%
 
Name Stage Failure
failed
build_clazy_clang_tidy Build

-- Configuring incomplete, errors occurred!
See also "/builds/utilities/kdebugsettings/build/CMakeFiles/CMakeOutput.log".
Uploading artifacts for failed job
Uploading artifacts...
WARNING: JUnitTestResults.xml: no matching files
ERROR: No files to upload
Cleaning up file based variables
ERROR: Job failed: exit code 1