Trying to change the pipe name for your instance to "\. \ Pipe \ sql \ query".
This parameter can be found by starting SQL Server Configuration Manager and going to SQL Server Network Configuration> Protocols for (Instance Name) and right-clicking on Named Pipes and selecting Properties. If Named Pipes is not enabled, be sure to enable it before restarting the SQL Server service (see Comment from @NoahHeldman).
When connecting to a default instance (that is, without an instance name), SQL Server uses the default port 1433 and the default channel name is "\. \ Pipe \ sql \ query". Changing it back into alignment should (hopefully) fix it.
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