Add proper error popup when theme fails to load

client/homebrew/navbar/error-navitem.jsx

@@ -104,6 +104,18 @@ const ErrorNavItem = createClass({
 			</Nav.item>;
 		}
 
+		if(HBErrorCode === '09') {
+			return <Nav.item className='save error' icon='fas fa-exclamation-triangle'>
+				Oops!
+				<div className='errorContainer' onClick={clearError}>
+					Looks like there was a problem retreiving
+					the theme, or a theme that it inherits,
+					for this brew. Verify that brew <a className='lowercase' target='_blank' rel='noopener noreferrer' href={`/share/${response.body.brewId}`}>
+					{response.body.brewId}</a> still exists! 
+				</div>
+			</Nav.item>;
+		}
+
 		return <Nav.item className='save error' icon='fas fa-exclamation-triangle'>
 			Oops!
 			<div className='errorContainer'>

client/homebrew/navbar/error-navitem.less

@@ -21,6 +21,9 @@
   font-size        : 10px;
   font-weight      : 800;
   text-transform   : uppercase;
+	.lowercase {
+		text-transform : none;
+	}
   a{
     color : @teal;
   }

client/homebrew/pages/errorPage/errors/errorIndex.js

@@ -136,6 +136,19 @@ const errorIndex = (props)=>{
 
 		**Brew ID:**  ${props.brew.brewId}`,
 
+		// Theme load error
+		'09' : dedent`
+		## No Homebrewery theme document could be found.
+		
+		The server could not locate the Homebrewery document. It was likely deleted by
+		its owner.
+		
+		:
+
+		**Requested access:** ${props.brew.accessType}
+
+		**Brew ID:**  ${props.brew.brewId}`,
+
 		// Brew locked by Administrators error
 		'100' : dedent`
 		## This brew has been locked.