diff --git a/php-server.err.log b/php-server.err.log
index af389a9..1754cec 100644
--- a/php-server.err.log
+++ b/php-server.err.log
@@ -432,3 +432,51 @@
 [Sun Apr  5 09:31:52 2026] 127.0.0.1:63903 Accepted
 [Sun Apr  5 09:32:56 2026] 127.0.0.1:63903 Closed without sending a request; it was probably just an unused speculative preconnection
 [Sun Apr  5 09:32:56 2026] 127.0.0.1:63903 Closing
+[Sun Apr  5 09:43:44 2026] 127.0.0.1:64365 Accepted
+[Sun Apr  5 09:43:44 2026] 127.0.0.1:64365 [200]: GET /tcrb_lightcurve.php?filters%5B%5D=V
+[Sun Apr  5 09:43:44 2026] 127.0.0.1:64365 Closing
+[Sun Apr  5 09:43:44 2026] 127.0.0.1:60114 Accepted
+[Sun Apr  5 09:43:44 2026] 127.0.0.1:60114 [200]: GET /css/style.css
+[Sun Apr  5 09:43:44 2026] 127.0.0.1:60114 Closing
+[Sun Apr  5 09:43:44 2026] 127.0.0.1:59252 Accepted
+[Sun Apr  5 09:43:44 2026] 127.0.0.1:61066 Accepted
+[Sun Apr  5 09:43:44 2026] 127.0.0.1:59252 [200]: GET /images/star16x16.png
+[Sun Apr  5 09:43:44 2026] 127.0.0.1:61066 [200]: GET /images/star16x16_rays.png
+[Sun Apr  5 09:43:44 2026] 127.0.0.1:59252 Closing
+[Sun Apr  5 09:43:44 2026] 127.0.0.1:61066 Closing
+[Sun Apr  5 09:43:44 2026] 127.0.0.1:60677 Accepted
+[Sun Apr  5 09:43:45 2026] 127.0.0.1:60677 [200]: GET /favicon.ico
+[Sun Apr  5 09:43:45 2026] 127.0.0.1:60677 Closing
+[Sun Apr  5 09:43:45 2026] 127.0.0.1:57931 Accepted
+[Sun Apr  5 09:44:56 2026] 127.0.0.1:57931 Closed without sending a request; it was probably just an unused speculative preconnection
+[Sun Apr  5 09:44:56 2026] 127.0.0.1:57931 Closing
+[Sun Apr  5 09:52:02 2026] 127.0.0.1:55157 Accepted
+[Sun Apr  5 09:52:02 2026] 127.0.0.1:55157 [200]: GET /admin_users.php
+[Sun Apr  5 09:52:02 2026] 127.0.0.1:55157 Closing
+[Sun Apr  5 09:52:02 2026] 127.0.0.1:65422 Accepted
+[Sun Apr  5 09:52:02 2026] 127.0.0.1:65422 [200]: GET /css/style.css
+[Sun Apr  5 09:52:02 2026] 127.0.0.1:65422 Closing
+[Sun Apr  5 09:52:03 2026] 127.0.0.1:58737 Accepted
+[Sun Apr  5 09:52:03 2026] 127.0.0.1:58737 [200]: GET /images/star16x16.png
+[Sun Apr  5 09:52:03 2026] 127.0.0.1:58737 Closing
+[Sun Apr  5 09:52:03 2026] 127.0.0.1:50158 Accepted
+[Sun Apr  5 09:52:03 2026] 127.0.0.1:54322 Accepted
+[Sun Apr  5 09:52:03 2026] 127.0.0.1:50158 [200]: GET /images/star16x16_rays.png
+[Sun Apr  5 09:52:03 2026] 127.0.0.1:50158 Closing
+[Sun Apr  5 09:52:03 2026] 127.0.0.1:54322 [200]: GET /favicon.ico
+[Sun Apr  5 09:52:03 2026] 127.0.0.1:54322 Closing
+[Sun Apr  5 09:52:05 2026] 127.0.0.1:55126 Accepted
+[Sun Apr  5 09:52:06 2026] 127.0.0.1:55126 [200]: GET /settings.php
+[Sun Apr  5 09:52:06 2026] 127.0.0.1:55126 Closing
+[Sun Apr  5 09:52:06 2026] 127.0.0.1:54546 Accepted
+[Sun Apr  5 09:52:06 2026] 127.0.0.1:54546 [200]: GET /css/style.css
+[Sun Apr  5 09:52:06 2026] 127.0.0.1:54546 Closing
+[Sun Apr  5 09:52:06 2026] 127.0.0.1:53320 Accepted
+[Sun Apr  5 09:52:06 2026] 127.0.0.1:53320 [200]: GET /images/star16x16.png
+[Sun Apr  5 09:52:06 2026] 127.0.0.1:53320 Closing
+[Sun Apr  5 09:52:06 2026] 127.0.0.1:59734 Accepted
+[Sun Apr  5 09:52:06 2026] 127.0.0.1:58998 Accepted
+[Sun Apr  5 09:52:06 2026] 127.0.0.1:59734 [200]: GET /images/star16x16_rays.png
+[Sun Apr  5 09:52:06 2026] 127.0.0.1:59734 Closing
+[Sun Apr  5 09:52:07 2026] 127.0.0.1:58998 [200]: GET /favicon.ico
+[Sun Apr  5 09:52:07 2026] 127.0.0.1:58998 Closing
diff --git a/scripts/telegram/telegram_cron.php b/scripts/telegram/telegram_cron.php
index 650b0c9..ef2d27e 100644
--- a/scripts/telegram/telegram_cron.php
+++ b/scripts/telegram/telegram_cron.php
@@ -331,6 +331,24 @@ function isTaskDue(string $schedule, DateTimeImmutable $nowBerlin): bool
 function writeMessage(string $message, bool $isError = false): void
 {
     $prefix = '[' . (new DateTimeImmutable('now'))->format('Y-m-d H:i:s') . '] ';
-    $stream = $isError ? STDERR : STDOUT;
+    $defaultStream = $isError ? 'php://stderr' : 'php://stdout';
+
+    if ($isError && defined('STDERR')) {
+        fwrite(STDERR, $prefix . $message . PHP_EOL);
+        return;
+    }
+
+    if (!$isError && defined('STDOUT')) {
+        fwrite(STDOUT, $prefix . $message . PHP_EOL);
+        return;
+    }
+
+    $stream = @fopen($defaultStream, 'wb');
+    if ($stream === false) {
+        error_log($prefix . $message);
+        return;
+    }
+
     fwrite($stream, $prefix . $message . PHP_EOL);
+    fclose($stream);
 }