Hi:
There is an option in the qRules injector to select Browser or Client -- was Browser selected? Is your form saved as browser compatible?
As to "the data no longer submits to the form library" -- I think what you are saying is that your form has a Submit connection that submits to a SharePoint library, and that connection is no longer working?
Just the injection of qRules should not affect your data connections. Perhaps walk through the data connection wizard again for your submit connection and make sure everything is as you anticipate (i.e., you're submitting to the library you expect, you are either creating unique file names or have selected the overwrite option, etc)