X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/ae4487921350e141efed42fdf7cd3fd70d72bc97..6142980d07db9fb6c96c91adb143d04bb26911b2:/CONFIGURE.md

diff --git a/CONFIGURE.md b/CONFIGURE.md
index 3cbe31cb9..0b8af0483 100644
--- a/CONFIGURE.md
+++ b/CONFIGURE.md
@@ -86,6 +86,8 @@ potlatch2_key: "8lFmZPsagHV4l3rkAHq0hWY5vV3Ctl3oEFY1aXth"
 
 Follow the same process for registering and configuring iD (`id_key`) and the website/Notes (`oauth_key`), or to save time, simply reuse the same consumer key for each.
 
+**NOTE:** If you forget to set up OAuth, then you will get an error message similar to `uninitialized constant ActionView::CompiledTemplates::ID_KEY`.
+
 ## Troubleshooting
 
 Rails has its own log.  To inspect the log, do this: