After update 1-9-5, I get the follwoing error message:
Fatal error: LayoutRendererStandard::prepareBlocks(): The script tried to execute a method or access a property of an incomplete object. Please ensure that the class definition "ViewsBlock" of the object you are trying to operate on was loaded _before_ unserialize() gets called or provide a __autoload() function to load the class definition in /<MYSITE>/core/modules/layout/plugins/renderers/layout_renderer_standard.inc on line 214
Replacing the previous core do not solve to problem (1-9-5 did not asked for db update if I remember correctly).
I did not find similar issue in the forum, nor by searching the web...
Any idea how to solve?