MT4 Build 971 EA won't attach to chart...previous build works fine

 
Hi I'm not sure who to ask and didn't seem to find service desk here. Since the new build 971 came out my EA will not attach to chart nor open in backtesting. Does anyone know what the problem might be as previous version works fine.
Please let me know if anyone has any answers or who to contact.
Thank you.
 

Please do a search here before posting. The same query was recently posted and and possible answers provided: https://www.mql5.com/en/forum/159465

Also, with regards to contacting the service desk, that has been asked and answered here many, many times, so learn to do a search: Get in touch with developers using Service Desk!