MWS: Error POP.012.0001.wm_commonsearchresults

Hello,

I am using MywebMethods-Server version 6.5.2 and when I try to display the Brokers of a Broker-Server or try to browse a queue I get the error POP.012.0001.wm_commonsearchresults.

I already reinstalled the Broker and the MywebMethods-Server (as well without any fixes) but that did not fixed the problem.
Could you please give me hints how this problem could be fixed?

Many thanks in advance!