This applies to Lucee 188.8.131.52-RC
At a certain point while testing Lucee 5, I could no longer access the admin panel when navigating to http://localhost:8888/lucee/admin/server.cfm. I got the error "key [server] doesn't exist". Note from the stacktrace below that the path "*/Users/mic/Projects/ ... *" does not exist on my machine!
The issue was resolved by stopping and restarting Lucee 5. My original suspicion was that there might be a conflict running Lucee 4.5 and Lucee 5 at the same time. At the moment, I have both running and both admin panels open, and I cannot replicate it now.
Here's the stacktrace: