В параметрах BindingParameters контекста BindingContext найдено несколько объектов "<var>X</var>". Это обычно вызвано наличием нескольких объектов "<var>X</var>" в привязке CustomBinding. Удалите все эти элементы, кроме одного.

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Unlocalized message

More than one '<var>X</var>' objects were found in the BindingParameters of the BindingContext. This is usually caused by having multiple '<var>X</var>' objects in a CustomBinding. Remove all but one of these elements.

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