I am recieving a php fatal error from this plugin

PHP Fatal error: Uncaught malkusch\lock\exception\LockAcquireException: Failed to lock the file. in /nas/content/live/chmarkt/wp-content/plugins/traffic/includes/libraries/lock/mutex/FlockMutex.php:142#012Stack trace:#012#0 /nas/content/live/chmarkt/wp-content/plugins/traffic/includes/libraries/lock/mutex/FlockMutex.php(123): malkusch\lock\mutex\FlockMutex->acquireNonBlockingLock()#012#1 /nas/content/live/chmarkt/wp-content/plugins/traffic/includes/libraries/lock/util/Loop.php(99): malkusch\lock\mutex\FlockMutex->malkusch\lock\mutex\{closure}()#012#2 /nas/content/live/chmarkt/wp-content/plugins/traffic/includes/libraries/lock/mutex/FlockMutex.php(122): malkusch\lock\util\Loop->execute(Object(Closure))#012#3 /nas/content/live/chmarkt/wp-content/plugins/traffic/includes/libraries/lock/mutex/FlockMutex.php(164): malkusch\lock\mutex\FlockMutex->lockBusy()#012#4 /nas/content/live/chmarkt/wp-content/plugins/traffic/includes/libraries/lock/mutex/LockMutex.php(43): malkusch\lock\mutex\FlockMutex->lock()#012#5 /nas/content/live/chmarkt/wp-content/plugins/traffic/includes/features/class-memory.php(158): malkusch\lock\mutex\LockMutex->synchronized(Object(Closure))#012#6 /nas/content/live/chmarkt/wp-content/plugins/traffic/includes/features/class-memory.php(114): Traffic\Plugin\Feature\Memory::write_records_to_memory()#012#7 /nas/content/live/chmarkt/wp-includes/class-wp-hook.php(322): Traffic\Plugin\Feature\Memory::write()#012#8 /nas/content/live/chmarkt/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array)#012#9 /nas/content/live/chmarkt/wp-includes/plugin.php(517): WP_Hook->do_action(Array)#012#10 /nas/content/live/chmarkt/wp-includes/load.php(1280): do_action(‘shutdown’)#012#11 [internal function]: shutdown_action_hook()#012#12 {main}#012 thrown in /nas/content/live/chmarkt/wp-content/plugins/traffic/includes/libraries/lock/mutex/FlockMutex.php on line 142

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