fix: error from Caddy

[alexislefebvre]

Q	A
Branch?	4.2
Tickets	.
License	MIT
Doc PR	.

It was generating one error per second:

php-1                | 2026/01/28 17:04:20.778  ERROR   Setting the "transport_url" directive is not available anymore, use the "transport" directive instead
php-1                | 2026/01/28 17:04:21.778  ERROR   Setting the "transport_url" directive is not available anymore, use the "transport" directive instead
php-1                | 2026/01/28 17:04:22.778  ERROR   Setting the "transport_url" directive is not available anymore, use the "transport" directive instead
php-1                | 2026/01/28 17:04:23.778  ERROR   Setting the "transport_url" directive is not available anymore, use the "transport" directive instead
php-1                | 2026/01/28 17:04:24.778  ERROR   Setting the "transport_url" directive is not available anymore, use the "transport" directive instead
php-1                | 2026/01/28 17:04:25.778  ERROR   Setting the "transport_url" directive is not available anymore, use the "transport" directive instead
php-1                | 2026/01/28 17:04:26.778  ERROR   Setting the "transport_url" directive is not available anymore, use the "transport" directive instead
php-1                | 2026/01/28 17:04:27.778  ERROR   Setting the "transport_url" directive is not available anymore, use the "transport" directive instead
php-1                | 2026/01/28 17:04:28.778  ERROR   Setting the "transport_url" directive is not available anymore, use the "transport" directive instead
php-1                | 2026/01/28 17:04:29.778  ERROR   Setting the "transport_url" directive is not available anymore, use the "transport" directive instead

Changing this remove these repeated errors but show one error once:

php-1                | 2026/01/28 17:04:30.778  ERROR   watcher unable to load latest config    {"config_file": "/etc/caddy/Caddyfile", "error": "adapting config using caddyfile: parsing caddyfile tokens for 'mercure': getting module named 'http.handlers.mercure.bolt:///data/mercure.db': module not registered: http.handlers.mercure.bolt:///data/mercure.db, at /etc/caddy/Caddyfile:31"}

[alexislefebvre]

Mhh, this broke the php container in CI. 😬

[vincentchalamon]

Error in CI:

Error: adapting config using caddyfile: parsing caddyfile tokens for 'mercure': getting module named 'http.handlers.mercure.bolt:///data/mercure.db': module not registered: http.handlers.mercure.bolt:///data/mercure.db, at /etc/caddy/Caddyfile:31

@alexislefebvre if you're stuck on this error, maybe @dunglas could help.

[alexislefebvre]

Someone else encountered the same error but ended up with another error after removing _url: https://stackoverflow.com/questions/79878069/caddy-crashes-with-an-error-when-configuring-mercure

[vincentchalamon]

Fixed with https://mercure.rocks/docs/UPGRADE#0-17

[vincentchalamon]

Backport available on api-platform/api-platform here: api-platform/api-platform#2976

[alexislefebvre]

Thanks @vincentchalamon!