Fatal error 500

The Server Log lists the following after updating the plugin:

12.01.2018 08:39:18 relaunch.zirkus-barbarella.de [client 2003:7f:cf00::] PHP Parse error: syntax error, unexpected ‘[‘ in /mnt/web009/d0/56/5138456/htdocs/WordPress_barbarella2017/WordPress/wp-content/plugins/event-calendar-wd/includes/ecwd-cpt-class.php on line 658, referer: https://relaunch.zirkus-barbarella.de/wp-admin/plugins.php
12.01.2018 08:39:26 relaunch.zirkus-barbarella.de [client 2003:7f:cf00::] PHP Parse error: syntax error, unexpected ‘[‘ in /mnt/web009/d0/56/5138456/htdocs/WordPress_barbarella2017/WordPress/wp-content/plugins/event-calendar-wd/includes/ecwd-cpt-class.php on line 658
12.01.2018 08:39:39 relaunch.zirkus-barbarella.de [client 2003:7f:cf00::] PHP Parse error: syntax error, unexpected ‘[‘ in /mnt/web009/d0/56/5138456/htdocs/WordPress_barbarella2017/WordPress/wp-content/plugins/event-calendar-wd/includes/ecwd-cpt-class.php on line 658
12.01.2018 08:39:53 relaunch.zirkus-barbarella.de [client 2003:7f:cf00::] PHP Parse error: syntax error, unexpected ‘[‘ in /mnt/web009/d0/56/5138456/htdocs/WordPress_barbarella2017/WordPress/wp-content/plugins/event-calendar-wd/ecwd_admin_class.php on line 782, referer: https://relaunch.zirkus-barbarella.de/wp-admin/plugins.php
12.01.2018 08:39:54 relaunch.zirkus-barbarella.de [client 2003:7f:cf00::] PHP Parse error: syntax error, unexpected ‘[‘ in /mnt/web009/d0/56/5138456/htdocs/WordPress_barbarella2017/WordPress/wp-content/plugins/event-calendar-wd/ecwd_admin_class.php on line 782, referer: https://relaunch.zirkus-barbarella.de/wp-admin/plugins.php
12.01.2018 08:40:00 relaunch.zirkus-barbarella.de [client 2003:7f:cf00::] PHP Parse error: syntax error, unexpected ‘[‘ in /mnt/web009/d0/56/5138456/htdocs/WordPress_barbarella2017/WordPress/wp-content/plugins/event-calendar-wd/ecwd_admin_class.php on line 782, referer: https://relaunch.zirkus-barbarella.de/wp-admin/plugins.php
12.01.2018 08:40:03 relaunch.zirkus-barbarella.de [client 2003:7f:cf00::] PHP Parse error: syntax error, unexpected ‘[‘ in /mnt/web009/d0/56/5138456/htdocs/WordPress_barbarella2017/WordPress/wp-content/plugins/event-calendar-wd/ecwd_admin_class.php on line 782, referer: https://relaunch.zirkus-barbarella.de/wp-admin/post-new.php?post_type=ecwd_event&wp-post-new-reload=true
12.01.2018 08:40:05 relaunch.zirkus-barbarella.de [client 2003:7f:cf00::] PHP Parse error: syntax error, unexpected ‘[‘ in /mnt/web009/d0/56/5138456/htdocs/WordPress_barbarella2017/WordPress/wp-content/plugins/event-calendar-wd/ecwd_admin_class.php on line 782, referer: https://relaunch.zirkus-barbarella.de/wp-admin/post.php?post=362&action=edit
12.01.2018 08:40:06 relaunch.zirkus-barbarella.de [client 2003:7f:cf00::] PHP Parse error: syntax error, unexpected ‘[‘ in /mnt/web009/d0/56/5138456/htdocs/WordPress_barbarella2017/WordPress/wp-content/plugins/event-calendar-wd/ecwd_admin_class.php on line 782, referer: https://relaunch.zirkus-barbarella.de/wp-admin/post-new.php?post_type=ecwd_event&wp-post-new-reload=true
12.01.2018 08:40:33 relaunch.zirkus-barbarella.de [client 2003:7f:cf00::] PHP Parse error: syntax error, unexpected ‘[‘ in /mnt/web009/d0/56/5138456/htdocs/WordPress_barbarella2017/WordPress/wp-content/plugins/event-calendar-wd/ecwd_admin_class.php on line 782
12.01.2018 08:41:36 relaunch.zirkus-barbarella.de [client 2003:7f:cf00::] PHP Parse error: syntax error, unexpected ‘[‘ in /mnt/web009/d0/56/5138456/htdocs/WordPress_barbarella2017/WordPress/wp-content/plugins/event-calendar-wd/ecwd_admin_class.php on line 782
12.01.2018 08:43:21 zirkus-barbarella.de [client 2003:7f:cf00::] PHP Warning: Creating default object from empty value in /mnt/web009/d0/56/5138456/htdocs/zirkus/version2/blog/wp-content/plugins/paged-guestbook.php on line 24, referer: https://zirkus-barbarella.de/
12.01.2018 08:44:01 relaunch.zirkus-barbarella.de [client 2003:7f:cf00::] PHP Parse error: syntax error, unexpected ‘[‘ in /mnt/web009/d0/56/5138456/htdocs/WordPress_barbarella2017/WordPress/wp-content/plugins/event-calendar-wd/includes/ecwd-cpt-class.php on line 658

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