Panic in Arbiter thread about actix HOT 1 CLOSED

One day I will learn to read I promise. The error message was:

thread 'main' panicked at 'Error retrieving the database url: NotPresent', src/main.rs:80:43
note: run with RUST_BACKTRACE=1 environment variable to display a backtrace
Panic in Arbiter thread.

My eyes jumped to the last line "Panic in Arbiter thread." but the root cause is the first line "'Error retrieving the database url: NotPresent".

At any rate I posted about this test project because I had started my own project based on this one and it too was getting the "Panic in Arbiter thread" error, so when I tried to run the sample app and received the same error I thought I had discovered a bug. When I figured out that it was just a reading problem on my part I went back and read the FULL error message on my app and it read "thread 'main' panicked at 'System is not running'". When I researched that it turned out to be a version mis-match issue between actix, actix-rt, and actix-web. Once I got all of those versions lined up, now my app is running. My apologies for creating a false ticket. If anyone else runs across this message, read the FULL error. Also to figure out the dependency hell use crates.io and the dependency tab. That is how I figured out a set of libraries that would work together.

from actix.