Freshly installed OpenFire 5.0.1. My client throws errors when trying to publish vCard with an avatar. Here is the log: 2025.08.06 08:02:19.439 ERROR [socket_c2s-worker-15]: org.jivesoftware.openfire.handler.IQHandler - Internal Server Error java.lang.IllegalArgumentException: Illegal base64 char…

Thanks, that was very helpful. Openfire is overly strict. It allows newlines, but only when they’re used to wrap every 76 characters. The data that you’ve provided is using 74. Openfire should be less strict (various XMPP specifications even declare that any whitespace characters in Base64 encoded…

OpenFire 5.0.1 Base64 Error when uploading avatars

Openfire

stokito August 7, 2025, 12:56pm 7

The char with code 20 is a space symbol. I remember there was some changes about the base64 decoder. See a similar problem