On category page I am getting this exception
Catalog Layer has been already created
I tried to debug it in vendor/magento/module-catalog/Model/Layer/Resolver.php, for the moment i commented the code that triggers exception
public function create($layerType)
{
/*if (isset($this->layer)) {
throw new \RuntimeException('Catalog Layer has been already created');
}*/
if (!isset($this->layersPool[$layerType])) {
throw new \InvalidArgumentException($layerType . ' does not belong to any registered layer');
}
$this->layer = $this->objectManager->create($this->layersPool[$layerType]);
}