is not a valid template name

[waar19]

Why happen this, sometimes

RuntimeException: [route/to/page] is not a valid template name.
at Foil.Engine.render(Engine.php:214)
at Foil.Template.Template.insert(Template.php:188)
at require(default.php:14)
at Foil.Template.Template.collect(Template.php:287)
at Foil.Template.Template.render(Template.php:231)
at Foil.Engine.doRender(Engine.php:307)
at Foil.Engine.render(Engine.php:211)
at Goteo.Application.View.render(View.php:55)
at Goteo.Core.Controller.viewResponse(Controller.php:29)
at Goteo.Controller.AdminController.indexAction(AdminController.php:188)
at call_user_func_array(Unknown Source)
at Symfony.Component.HttpKernel.HttpKernel.handleRaw(HttpKernel.php:144)
at Symfony.Component.HttpKernel.HttpKernel.handle(HttpKernel.php:64)
at Goteo.Application.App.run(App.php:179)
at (main)(index.php:43)

[gmazzap]

@waar19 That error is thrown when the template you try to load is not found or not readable. Without more information I can't tell you why that happen.