Can not flush cache

caddy version: 1.11.2

$ curl -v -X PURGE http://localhost:2019/souin-api/souin/flush
* Host localhost:2019 was resolved.
* IPv6: ::1
* IPv4: 127.0.0.1
*   Trying [::1]:2019...
* Connected to localhost (::1) port 2019
* using HTTP/1.x
> PURGE /souin-api/souin/flush HTTP/1.1
> Host: localhost:2019
> User-Agent: curl/8.14.1
> Accept: */*
> 
* Request completely sent off
* Empty reply from server
* shutting down connection #0
curl: (52) Empty reply from server

log

{"level":"info","ts":1773995888.740839,"logger":"admin.api","msg":"received request","method":"PURGE","host":"localhost:2019","uri":"/souin-api/souin/flush","remote_ip":"10.88.0.112","remote_port":"54338","headers":{"Accept":["*/*"],"User-Agent":["curl/8.14.1"]}}
{"level":"info","ts":1773995888.7425144,"msg":"http: panic serving 10.88.0.112:54338: runtime error: invalid memory address or nil pointer dereference\ngoroutine 2663 [running]:\nnet/http.(*conn).serve.func1()\n\tnet/http/server.go:1907 +0xbd\npanic({0x1c7bd00?, 0x37542c0?})\n\truntime/panic.go:860 +0x13a\ngithub.com/darkweak/souin/pkg/api.(*SouinAPI).HandleRequest(0x2514e81b5020, {0x23581f0, 0x2514e9083110}, 0x2514e8130140)\n\tgithub.com/darkweak/souin@v1.7.7/pkg/api/souin.go:316 +0x931\ngithub.com/caddyserver/cache-handler.(*adminAPI).handleAPIEndpoints(0x2514e8643050?, {0x23581f0, 0x2514e9083110}, 0x2514e8130140)\n\tgithub.com/caddyserver/cache-handler@v0.16.0/admin.go:41 +0xf2\ngithub.com/caddyserver/caddy/v2.AdminHandlerFunc.ServeHTTP(0x425234?, {0x23581f0?, 0x2514e9083110?}, 0x2514e925aab0?)\n\tgithub.com/caddyserver/caddy/v2@v2.11.2/admin.go:1360 +0x29\ngithub.com/caddyserver/caddy/v2.(*AdminConfig).newAdminHandler.(*AdminConfig).newAdminHandler.func2.func6({0x23581f0, 0x2514e9083110}, 0x2514e8130140)\n\tgithub.com/caddyserver/caddy/v2@v2.11.2/admin.go:248 +0x7b\nnet/http.HandlerFunc.ServeHTTP(0x2358580?, {0x23581f0?, 0x2514e9083110?}, 0x2514e860b750?)\n\tnet/http/server.go:2286 +0x29\ngithub.com/caddyserver/caddy/v2.(*AdminConfig).newAdminHandler.func1.instrumentHandlerCounter.1({0x2358580?, 0x2514e82fe5a0?}, 0x2514e8130140)\n\tgithub.com/caddyserver/caddy/v2@v2.11.2/metrics.go:56 +0x6f\nnet/http.HandlerFunc.ServeHTTP(0x2514e927e3c0?, {0x2358580?, 0x2514e82fe5a0?}, 0x74c47f?)\n\tnet/http/server.go:2286 +0x29\nnet/http.(*ServeMux).ServeHTTP(0x2514e8640f90?, {0x2358580, 0x2514e82fe5a0}, 0x2514e8130140)\n\tnet/http/server.go:2828 +0x1c7\ngithub.com/caddyserver/caddy/v2.adminHandler.serveHTTP({0x2514e927e3c0, 0x0, 0x0, {0x2514e7e86528, 0x1, 0x1}, 0x0}, {0x2358580, 0x2514e82fe5a0}, 0x2514e8130140)\n\tgithub.com/caddyserver/caddy/v2@v2.11.2/admin.go:891 +0x793\ngithub.com/caddyserver/caddy/v2.adminHandler.ServeHTTP({0x2514e927e3c0, 0x0, 0x0, {0x2514e7e86528, 0x1, 0x1}, 0x0}, {0x2358580, 0x2514e82fe5a0}, 0x2514e8130140)\n\tgithub.com/caddyserver/caddy/v2@v2.11.2/admin.go:816 +0x7a5\nnet/http.serverHandler.ServeHTTP({0x2514e829d180?}, {0x2358580?, 0x2514e82fe5a0?}, 0x1?)\n\tnet/http/server.go:3311 +0x8e\nnet/http.(*conn).serve(0x2514e925aa20, {0x235da70, 0x2514e85e1380})\n\tnet/http/server.go:2073 +0x650\ncreated by net/http.(*Server).Serve in goroutine 2372\n\tnet/http/server.go:3464 +0x485"}

Caddyfile

{
	debug
	order cache before rewrite

	cache {
		api {
			souin
		}
	}
}

example.com {
    @cacheable {
        not path /
    }
    handle @cacheable {
        cache {
            ttl 120s
        }
    }

    file_server
}

Start at pkg/api/souin.go:316, where the PURGE request to /souin-api/souin/flush panics, and compare it with the Caddyfile cache API configuration. Reproduce the request with the provided curl command and inspect the related API handler path. Done means the endpoint returns a response without a nil-pointer panic and flushes the cache as intended.