KeyError: 'something' not found in config file (...)
this means that the name you specified in ViewVC-plone's index_html is different from section name you wrote in mxmProxyTool.conf, or somehow the mxmProxyTool.conf is not there or is unreadable.
this means that the name you specified in ViewVC-plone's index_html is different from section name you wrote in mxmProxyTool.conf, or somehow the mxmProxyTool.conf is not there or is unreadable.