Error in slider type! Failed to open…

Error message:

Error in slider type!

Warning: include(context.php) [function.include]: failed to open stream: No such file or directory in /libraries/nextend/smartslider/slider.php on line 593

Warning: include() [function.include]: Failed opening 'context.php' for inclusion (include_path='.:/opt/alt/php53/usr/share/pear') in /libraries/nextend/smartslider/slider.php on line 593

Fatal error: Cannot redeclare nextend_try_to_test_memory_limit() (previously declared in /libraries/nextend/smartslider/slider.php:732) in /libraries/nextend/smartslider/slider.php on line 741

This error usually happens, when there is some cache in your website, so you should clear it, probably in the SystemClear Cacheselect all, and Delete them. If you also have “0 slides available for this slider” error message, check the previous part of the documentation.