Three different log errors

ℹ️ Support
1

Nextcloud is running well, however we get this log errors, see A, B and C.

A. Matterbridgemanager error two times each day, exactly 12 hours between (Mattermost/Matterbridge is not installed)

cron Error: Call to undefined function OCA\Talk\proc_open()

  1. /…/apps/spreed/lib/MatterbridgeManager.php line 725
    OCA\Talk\MatterbridgeManager->runCommand()
  2. /…/apps/spreed/lib/MatterbridgeManager.php line 851
    OCA\Talk\MatterbridgeManager->killZombieBridges()
  3. /…/apps/spreed/lib/BackgroundJob/CheckMatterbridges.php line 66
    OCA\Talk\MatterbridgeManager->stopAllBridges()
  4. /…/lib/public/BackgroundJob/Job.php line 78
    OCA\Talk\BackgroundJob\CheckMatterbridges->run()
  5. /…/lib/public/BackgroundJob/TimedJob.php line 103
    OCP\BackgroundJob\Job->start()
  6. /…/lib/public/BackgroundJob/TimedJob.php line 93
    OCP\BackgroundJob\TimedJob->start()
  7. /…/cron.php line 152
    OCP\BackgroundJob\TimedJob->execute()

B Token error (sometimes)

core Tried to log in ‘User’ but could not verify token

C. Session start error (sometimes)

PHP session_start(): Ignoring session_start() because a session is already active at /…/lib/private/Session/Internal.php#219