Created attachment 109444 [details] Screen capture of error Error when trying to Decrypt / Verify the electrum-3.0.3-portable.exe.asc file
The error should be more descriptive but this should not happen in normal use. Is the signed file electrum-3.0.3-portable.exe next to the signature electrum-3.0.3-portable.exe.asc ? And can you open both files for reading?
If you can provide the information requested in comment #1, please add it.
To further investigate this issue, KDE developers need the information requested in comment #1. If you can provide it, or need help with finding that information, please add a comment.
No response; changing status. If you have new information, please add a comment.