500 error

[TonyWhitley]

[Solved by ChatGPT, see below]
Heimdall stopped working on my Pi yesterday after running my Docker compose. I'd made a single change to the script to add a duplicate volume to another container but the Heimdall part is unchanged since... forever. The other containers are working fine and I see Heimdall hasn't changed for a month.

22ec0362e5a6 lscr.io/linuxserver/heimdall:latest "/init" 18 hours ago Up 31 minutes 0.0.0.0:80->80/tcp, [::]:80->80/tcp, 0.0.0.0:443->443/tcp, [::]:443->443/tcp heimdall

The log is repeats of

Stack trace:
#0 /app/www/artisan(9): require()
#1 {main}
thrown in /app/www/vendor/autoload.php on line 10
PHP Warning: require_once(/app/www/vendor/composer/autoload_real.php): Failed to open stream: No such file or directory in /app/www/vendor/autoload.php on line 10
PHP Fatal error: Uncaught Error: Failed opening required '/app/www/vendor/composer/autoload_real.php' (include_path='.:/usr/share/php84') in /app/www/vendor/autoload.php:10
/

ChatGPT to the rescue
Corrupted or partial installation

If your container crashed mid-install, the vendor/ directory might not have been generated.

Stop and remove the container:
docker rm -f heimdall