Thank you for your message. But Warning is not error. It is warning for developers.
I will fix this part of code. But it does not influence to functionality of plugin.
You have warnings like this "Warning: file_exists(): Unable to find the wrapper "chrome" - did you forget to enable it when you configured PHP? in /home/vhosts/kijkeensomlaag.nl/httpdocs/libraries/mavik/thumb/generator.php on line 265" because you have html-code like this: