View Report empty (OJS 2.4.8)

Hi,
When I try to open View Report in Report Generator (OJS 2.4.8.0) there are no statistics in the file. I think it is strange, because the Articles Report works just fine. I also checked that the plugin is enabled and the base_url is probably ok (even though there are " " symbols in the address).
Could anyone help generate these article view statistics?
Best regards
dobry