Hello,
Be aware that Akeeba Backup and the Joomla 2.5.4 currently state that a new version (3.5a2) is available.
This is NOT a production version and currently causes problems.
If you have downloaded this update and find Akeeba missing, you should do the following.
Got to Administrator/Extension Manager/Manage.
Uninstall Akeeba Core.
Download the current Akeeba 3.4.3 version.
Go to Administrator/Extension Manager/Upload Package File.
Once installed run the Configuration Wizard.
Once completed, run an Akeeba Backup.
Hope that helps others who may have found the same issue.
NOTE:
Both Akeeba Backup and the Joomla 2.5.4 will continue to advise that a new version is available until this issue is fixed.
You should IGNORE the notification from Akeeba and ensure that the Akeeba update option in Administrator/Extension Manager/Update is unselected until the error is fixed.
Regards,
CHRIS
Nicolas,
This shouldn't be appearing as a production site update yet.
It causes your excellent product to disappear from menus and control panel amongst other issues.