Compilation failed – wassup.php on line 3954

Warning: preg_match() [function.preg-match]: Compilation failed: nothing to repeat at offset 1 in /xxxx/xxx/xx/xx/xx/wp-content/plugins/wassup/wassup.php on line 3954

Warning: preg_match() [function.preg-match]: Compilation failed: nothing to repeat at offset 1 in /xxxx/xxx/xx/xx/xx/wp-content/plugins/wassup/wassup.php on line 3954

these 2 errors appeared on the bottom of my website. both errors are same. it happened today, several times. I can’t see these errors when I’m logged in on my website, or maybe it happens, just I didn’t face.

I don’t use and cache plugin. and now I deactivated WASSUP.

Regards