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When I run dep deploy on my terminal and I got a General error

In Client.php line 99:

The command "/usr/bin/php /var/www/dev/dev/releases/1/artisan config:cache" failed.

Exit Code: 1 (General error)

Host Name: ****.****.com

================
Configuration cache cleared!

In ConfigCacheCommand.php line 71:

Your configuration files are not serializable.                                     

In config.php line 123:

Call to undefined method Closure::__set_state()

In Client.php line 99:

The command "/usr/bin/php /var/www/dev/dev/releases/1/artisan config:cache" failed.

Exit Code: 1 (General error)

Host Name: XXX.XXXX.com

================
Configuration cache cleared!

In ConfigCacheCommand.php line 71:

Your configuration files are not serializable.                                     

In config.php line 123:

Call to undefined method Closure::__set_state()

via Chebli Mohamed