The Google Webmaster Tools shows that the following page is linked through https://los-angeles.freeadstime.org/free-ads/60647/Gym-Stick-6lb---Weighted-Workout-Bar-10-Lb page: https://los-angeles.freeadstime.org/g,mt=RegExp( Of course, the "https://los-angeles.freeadstime.org/g,mt=RegExp(" doesn't exist and it shows a 404 error. I can't locate the "https://los-angeles.freeadstime.org/g,mt=RegExp(" link on the "https://los-angeles.freeadstime.org/free-ads/60647/Gym-Stick-6lb---Weighted-Workout-Bar-10-Lb" page, so I'm not sure how to remove it. It'll be great if someone can let me know how I can have this fixed. Thanks in advance.
I checked your source code and the link itself surely doesn't exist, but your page has a function that parses links and *might* add g,mt=RegExp to them. This snippet is a part of your jquery code, which seems to be very, very old. Maybe updating jquery would help? I checked my websites that use newer version of jquery, and none of them has g,mt=RegExp part.
Thanks for the replies, I made more changes after opening this thread. I hope this issue has been resolved, I'm monitoring the Webmaster Tools closely for the next few days to see if the error shows up again.