The new code to display the changelog of an available update in the extension manager produces a javascript error when you click on the button
/cc @roland-d
core.min.js?384e8209bc67fc38429624bf76893747:1 Uncaught TypeError: Cannot set property 'innerHTML' of undefined
at onSuccess (core.min.js?384e8209bc67fc38429624bf76893747:1)
at XMLHttpRequest.c.onreadystatechange (core.min.js?384e8209bc67fc38429624bf76893747:1)
onSuccess @ core.min.js?384e8209bc67fc38429624bf76893747:1
c.onreadystatechange @ core.min.js?384e8209bc67fc38429624bf76893747:1
XMLHttpRequest.send (async)
a.request @ core.min.js?384e8209bc67fc38429624bf76893747:1
a.loadChangelog @ core.min.js?384e8209bc67fc38429624bf76893747:1
onclick @ index.php?option=com_installer&view=update:546
joomla-cms-bot
- 
franz-wohlkoenig
- 
@brianteeman https://github.com/joomla/joomla-cms/blob/4.0-dev/build/media_source/system/js/core.es6.js#L938
Try replacing:
with this:
Although this Javascript really needs to be moved out of
core.jsand into a separate file associated withcom_installer: https://github.com/joomla/joomla-cms/blob/4.0-dev/build/media_source/com_installer/js/installer.es6.jsPerhaps someone can move the inline JS too: https://github.com/joomla/joomla-cms/pull/24026/files#diff-8bbf22d9af9d1d1e6f15a80c694446e2R109