Most likely causes:

A pub may be an inanimate object and thus unable to have a philosophy.
The philosophy of people within the pub may be unrelated to the activity of selling beer and liquor, and thus irrelevant to information displayed on a commercial Web site.

Please try the following:

Click the refresh button repeatedly until you are satisfied there is nothing here.
Try searching for philosophy on your preferred internet search engine instead of on a pub Web site.
If you typed the address in the address bar make sure you are not already so drunk that your fingers are not working correctly.
If you are trying to reach an information site ensure your browser settings can support it. In your Local options go to Library and under the Philosophy section scroll through and check the Wittgenstein, Descartes and Kant entries.
Click the back button and try another link.
Visit The Plasterers Arms in person and check with your alcohol service provider what version of spirituality, meaning and self they are using, in the Conversation option, under Advanced Settings.

The Web page cannot be displayed

The Web page you are looking for is currently unavailable. The Web site may be experiencing existential difficulties, or you may need to adjust your pub expectation settings.