1. Manually apply the following change:

   $ git diff

   diff --git a/lib/classes/session/manager.php b/lib/classes/session/manager.php

   index e1f6dc88453..22ed641f47a 100644

   --- a/lib/classes/session/manager.php

   +++ b/lib/classes/session/manager.php

   @@ -151,7 +151,7 @@ class manager {

   self::prepare_cookies();

   $isnewsession = empty($_COOKIE[session_name()]);

   - if (!self::$handler->start()) {

   + if (!self::$handler->start() || true) {

   // Could not successfully start/recover session.

   throw new \core\session\exception('sessionstarterror', 'error');

   }

2. Visit site
3. Confirm you see the following error:

   Couldn't start session

   Debug info:

   Error code: sessionstarterror

Code verified against automated checks with warnings.

Checked MDL-84901 using repository: https://github.com/paulholden/moodle.git

• MOODLE_405_STABLE (0 errors / 1 warnings) [branch: MDL-84901-405 | CI Job]
  • overview (0/1), phplint (0/0), phpcs (0/0), js (0/0), css (0/0), phpdoc (0/0), commit (0/0), savepoint (0/0), thirdparty (0/0), externalbackup (0/0), grunt (0/0), shifter (0/0), mustache (0/0), gherkin (0/0),
  • Warn: The MDL-84901-405 branch at https://github.com/paulholden/moodle.git has not been rebased recently (>20 days ago).
• MOODLE_500_STABLE (0 errors / 0 warnings) [branch: MDL-84901-500 | CI Job]
• main (0 errors / 1 warnings) [branch: MDL-84901 | CI Job]
  • overview (0/1), phplint (0/0), phpcs (0/0), js (0/0), css (0/0), phpdoc (0/0), commit (0/0), savepoint (0/0), thirdparty (0/0), externalbackup (0/0), grunt (0/0), shifter (0/0), mustache (0/0), gherkin (0/0),
  • Warn: The MDL-84901 branch at https://github.com/paulholden/moodle.git has not been rebased recently (>20 days ago).

Should these errors be fixed?

Built on: Mon Apr 28 10:21:48 UTC 2025

Launching automatic jobs for branch MDL-84901-404

• https://ci.moodle.org/view/Testing/job/DEV.02%20-%20Developer-requested%20PHPUnit/18724/ PHPUnit (sqlsrv)
• https://ci.moodle.org/view/Testing/job/DEV.01%20-%20Developer-requested%20Behat/64148/ Behat (NonJS - boost and classic)
• https://ci.moodle.org/view/Testing/job/DEV.01%20-%20Developer-requested%20Behat/64149/ Behat (Firefox - boost)

Launching automatic jobs for branch MDL-84901-405

• https://ci.moodle.org/view/Testing/job/DEV.02%20-%20Developer-requested%20PHPUnit/18725/ PHPUnit (sqlsrv)
• https://ci.moodle.org/view/Testing/job/DEV.01%20-%20Developer-requested%20Behat/64150/ Behat (NonJS - boost and classic)
• https://ci.moodle.org/view/Testing/job/DEV.01%20-%20Developer-requested%20Behat/64151/ Behat (Firefox - boost)

Launching automatic jobs for branch MDL-84901

• https://ci.moodle.org/view/Testing/job/DEV.02%20-%20Developer-requested%20PHPUnit/18726/ PHPUnit (sqlsrv)
• https://ci.moodle.org/view/Testing/job/DEV.01%20-%20Developer-requested%20Behat/64152/ Behat (NonJS - boost and classic)
• https://ci.moodle.org/view/Testing/job/DEV.01%20-%20Developer-requested%20Behat/64153/ Behat (Firefox - boost)
• https://ci.moodle.org/view/Testing/job/DEV.01%20-%20Developer-requested%20Behat/64154/ Behat (Firefox - classic)
• https://ci.moodle.org/view/Testing/job/DEV.01%20-%20Developer-requested%20Behat/64155/ App tests (stable app version)

Built on: Thu Mar 20 13:07:47 UTC 2025