Confluence "Page not found" and strange beaviour after upgrade to 5.2.5

[Valerie AQUILA]

Hello,

I've upgraded Confluence with the following path :

3.3.1 --> 3.5 --> 4.3.7 --> 5.2.5, ouf !

Now in 5.2.5, many features can not be used, with the "Page not found" error : Space Directory, Global Templates (admin), Import Templates (admin), Configure Code Macro (admin), Office Connector (admin), Schedule Job (admin), and more, and also Cache Statistics.

An exemple in the log is :

2013-10-01 16:30:42,838 ERROR [http-8080-3] [atlassian.confluence.servlet.ConfluenceServletDispatcher] serviceAction There is no Action mapped for namespace /admin and action name cachestatistics
 -- referer: http://lfrapps01-dev:8080/admin/viewgeneralconfig.action | url: /admin/cachestatistics.action | userName: adminconf

I've followed the instructions in the pages :

https://confluence.atlassian.com/display/CONFKB/There+is+no+Action+mapped+for+namespace+X+and+action+name+X

https://confluence.atlassian.com/display/CONFKB/How+to+Clear+Confluence+Plugins+Cache

But nothing changes.

Also, after restarting, at firt time I re-log in, some of the buttons and thumbnails titles are not translated and have their "technical name". As admin, I edit the the General Configuration, change nothing, than Save, and every buttons and thumbnails have their correct titles.

Could anybody helps ?

[Valerie AQUILA · Accepted solution]

After following the instructions in https://confluence.atlassian.com/display/DOC/Removing+Malfunctioning+Add-ons, and restarted, everything was normal.