Sample traceback

2006-03-15 15:39:42 BLATHER Zope Security Policy Unauthorized: No container provided.  
  Access to 'isPrincipiaFolderish' of None, acquired through 
  (Products.ResourceRegistries.tools.BaseRegistry.Skin object at 0x04C918D0), denied.
2006-03-15 15:39:42 BLATHER OFS Exception while rendering an error message
Traceback (most recent call last):
  File "F:\usability\Test\Plone21\Zope\lib\python\OFS\SimpleItem.py", line 209, in raise_standardErrorMessage
    v = s(**kwargs)
  File "F:\usability\Test\Plone21\Data\Products\CMFCore\FSPythonScript.py", line 108, in __call__
    return Script.__call__(self, *args, **kw)
  File "F:\usability\Test\Plone21\Zope\lib\python\Shared\DC\Scripts\Bindings.py", line 311, in __call__
    return self._bindAndExec(args, kw, None)
  File "F:\usability\Test\Plone21\Zope\lib\python\Shared\DC\Scripts\Bindings.py", line 348, in _bindAndExec
    return self._exec(bound_data, args, kw)
  File "F:\usability\Test\Plone21\Data\Products\CMFCore\FSPythonScript.py", line 163, in _exec
    result = f(*args, **kw)
  File "Script (Python)", line 16, in standard_error_message
  File "F:\usability\Test\Plone21\Zope\lib\python\Shared\DC\Scripts\Bindings.py", line 311, in __call__
    return self._bindAndExec(args, kw, None)
  File "F:\usability\Test\Plone21\Zope\lib\python\Shared\DC\Scripts\Bindings.py", line 348, in _bindAndExec
    return self._exec(bound_data, args, kw)
  File "F:\usability\Test\Plone21\Data\Products\CMFCore\FSPageTemplate.py", line 195, in _exec
    result = self.pt_render(extra_context=bound_names)
  File "F:\usability\Test\Plone21\Data\Products\CMFCore\FSPageTemplate.py", line 134, in pt_render
    result = FSPageTemplate.inheritedAttribute('pt_render')(
  File "F:\usability\Test\Plone21\Zope\lib\python\Products\PageTemplates\PageTemplate.py", line 102, in pt_render
    tal=not source, strictinsert=0)()
  File "F:\usability\Test\Plone21\Zope\lib\python\TAL\TALInterpreter.py", line 206, in __call__
    self.interpret(self.program)
  File "F:\usability\Test\Plone21\Zope\lib\python\TAL\TALInterpreter.py", line 250, in interpret
    handlers[opcode](self, args)
  File "F:\usability\Test\Plone21\Zope\lib\python\TAL\TALInterpreter.py", line 709, in do_useMacro
    self.interpret(macro)
  File "F:\usability\Test\Plone21\Zope\lib\python\TAL\TALInterpreter.py", line 250, in interpret
    handlers[opcode](self, args)
  File "F:\usability\Test\Plone21\Zope\lib\python\TAL\TALInterpreter.py", line 426, in do_optTag_tal
    self.do_optTag(stuff)
  File "F:\usability\Test\Plone21\Zope\lib\python\TAL\TALInterpreter.py", line 411, in do_optTag
    return self.no_tag(start, program)
  File "F:\usability\Test\Plone21\Zope\lib\python\TAL\TALInterpreter.py", line 406, in no_tag
    self.interpret(program)
  File "F:\usability\Test\Plone21\Zope\lib\python\TAL\TALInterpreter.py", line 250, in interpret
    handlers[opcode](self, args)
  File "F:\usability\Test\Plone21\Zope\lib\python\TAL\TALInterpreter.py", line 709, in do_useMacro
    self.interpret(macro)
  File "F:\usability\Test\Plone21\Zope\lib\python\TAL\TALInterpreter.py", line 250, in interpret
    handlers[opcode](self, args)
  File "F:\usability\Test\Plone21\Zope\lib\python\TAL\TALInterpreter.py", line 481, in do_setGlobal_tal
    self.engine.setGlobal(name, self.engine.evaluateValue(expr))
  File "F:\usability\Test\Plone21\Zope\lib\python\Products\PageTemplates\TALES.py", line 221, in evaluate
    return expression(self)
  File "F:\usability\Test\Plone21\Zope\lib\python\Products\PageTemplates\Expressions.py", line 183, in __call__
    return self._eval(econtext)
  File "F:\usability\Test\Plone21\Zope\lib\python\Products\PageTemplates\Expressions.py", line 171, in _eval
    ob = self._subexprs[-1](econtext)
  File "F:\usability\Test\Plone21\Zope\lib\python\Products\PageTemplates\Expressions.py", line 127, in _eval
    ob = restrictedTraverse(ob, path, getSecurityManager())
  File "F:\usability\Test\Plone21\Zope\lib\python\Products\PageTemplates\Expressions.py", line 295, in restrictedTraverse
    if not validate(object, container, name, o):
  File "F:\usability\Test\Plone21\Zope\lib\python\AccessControl\ImplPython.py", line 530, in validate
    self._context)
  File "F:\usability\Test\Plone21\Zope\lib\python\AccessControl\ImplPython.py", line 277, in validate
    accessed, container, name, value, context)
  File "F:\usability\Test\Plone21\Zope\lib\python\AccessControl\ImplPython.py", line 775, in raiseVerbose
    raise Unauthorized(text)
Unauthorized: No container provided.  Access to 'isPrincipiaFolderish' of None, acquired through 
  (Products.ResourceRegistries.tools.BaseRegistry.Skin object at 0x04C918D0), denied.

Solution

You touched something you shouldn't have in base_properties.prop, the file giving Plone CSS color definitions. Restore orignal values.