An error occured in Caspar

Illegal string offset 'base_url'

The following error occured:

Illegal string offset 'base_url' in /var/www/thebuggenie.com/caspar/caspar/libs/Spyc.class.php, line 884

Stack trace:

Log messages:

info [main] 0.05 ms  Initializing Caspar framework
info [main] 0.07 ms  PHP_SAPI says "apache2handler"
info [main] 0.07 ms  PHP_VERSION_ID says "70207"
info [main] 0.08 ms  PHP_VERSION says "7.2.7-1+ubuntu14.04.1+deb.sury.org+1"
info [main] 0.09 ms  APC cache is not enabled
info [main] 0.13 ms  Loading Caspar configuration
info [main] 0.14 ms  Configuration not cached. Retrieving configuration from file

SQL queries: