[opencms-dev] Strange GWT Error in OpenCms 8.5

[Siegfried Ehret]

Hi all,
I have a strange error when I edit a component in OpenCms 8.5.
The following error message appears : (TypeError): Cannot call method 'Pe' of null

In the log file :
08 Nov 2012 10:51:59,277 ERROR [ org.opencms.gwt.CmsLogService:  66] Client LOG (Host 127.0.0.1, Address 127.0.0.1, Ticket 1352368319267): (TypeError): Cannot call method 'Pe' of null
Unknown.Yc(Unknown Source)
Unknown.sm(Unknown Source)
Unknown.Yc(Unknown Source)
Unknown.sm(Unknown Source)
Unknown.ec(Unknown Source)
Unknown.ac(Unknown Source)
Unknown.rm(Unknown Source)
Unknown.Am(Unknown Source)
Unknown.Ucb(Unknown Source)
Unknown.Kgb(Unknown Source)

Not very helpfull and I don't know what I should do.
Have you encountered this error ?

Thanks.

-- 
Siegfried Ehret