Hello! I installed plugin and got a this error. "substr() expects parameter 1 to be string, array given" on line 469 of /web/home/designrhythm/html/vendor/laravel/framework/src/Illuminate/Support/Str.php" How can I fix?

Hello, please add some more detail, what version of OctoberCMS and php are you using? If you using an older php version (less than 7) can you update to like 7.2?

version is PHP 7.0 / MariaDB 10.0.37

http://designrhythm.net/themes/DESIGNRHYTHM-20190125/assets/images/error.jpg this is error page.