xmage stopped working completely after an update and now on a full reinstall this is what i'm getting

Error type: CLIENT - unhandled error in GUI - NoClassDefFoundError

Client version: 1.4.58-V1 (build: 2025-10-06 20:20)
Java version: 1.8.0_201
Default charset: UTF-8

Could not initialize class com.sun.imageio.plugins.jpeg.JPEGImageReader

Stack trace:
com.sun.imageio.plugins.jpeg.JPEGImageReaderSpi.createReaderInstance(JPEGImageReaderSpi.java:85)
javax.imageio.spi.ImageReaderSpi.createReaderInstance(ImageReaderSpi.java:320)
javax.imageio.ImageIO$ImageReaderIterator.next(ImageIO.java:529)
javax.imageio.ImageIO$ImageReaderIterator.next(ImageIO.java:513)
javax.imageio.ImageIO.read(ImageIO.java:1443)
javax.imageio.ImageIO.read(ImageIO.java:1352)
mage.client.util.ImageHelper.getImageFromResources(ImageHelper.java:122)
mage.client.dialog.PreferencesDialog.addAvatar(PreferencesDialog.java:3974)
mage.client.dialog.PreferencesDialog.addAvatars(PreferencesDialog.java:3932)
mage.client.dialog.PreferencesDialog.(PreferencesDialog.java:694)
and other 43 lines

Start by reproducing the client failure when opening PreferencesDialog and adding avatars, then trace the stack through mage.client.dialog.PreferencesDialog.java and mage.client.util.ImageHelper.java. Check the Java ImageIO JPEGImageReader initialization reported in the stack trace; done means a full reinstall no longer produces the unhandled GUI error.

Written by the indexing model from the issue text.