erro na pagina quando digita o dominio

tenho uma configuração de um servidor que funciona beleza mas outra nao esta funcionando dá a seguinte mensagem de erro.
While trying to retrieve the URL: /

The following error was encountered:

Invalid URL
Some aspect of the requested URL is incorrect. Possible problems:

Missing or incorrect access protocol (should be `http://´´ or similar)
Missing hostname
Illegal double-escape in the URL-Path
Illegal character in hostname; underscores are not allowed
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