docs(minErr): add minErr description for $compile:tpload

Closes #3427

Author: btford

docs/content/error/compile/tpload.ngdoc

@@ -1,4 +1,11 @@
 @ngdoc error
 @name $compile:tpload
-@fullName Template Loader Error
+@fullName Error Loading Template
 @description
+
+This error occurs when {@link api/ng.$compile `$compile`} attempts to fetch a template from some URL, and the request fails.
+
+To resolve this error, ensure that the URL of the template is spelled correctly and resolves to correct absolute URL.
+The [Chrome Developer Tools](https://developers.google.com/chrome-developer-tools/docs/network#network_panel_overview) might also be helpful in determining why the request failed.
+
+If you are using {@link api/ng.$templateCache} to pre-load templates, ensure that the cache was populated with the template.