I cannot use thr virtual dackground servies

Hi @774928674priyo thank you for your post here on the Zoom Community! If you have a specific error message or problem that occurs when you click on something, that would really help us. Also if you can tell us what operating system you are on such as Windows, Mac, iOS, etc. 

In the meantime it could be that your virtual background is not enabled in the web portal settings. Just in case I will drop this here for your review

https://support.zoom.us/hc/en-us/articles/210707503-Changing-your-Virtual-Background-image

If this has answered your question to your satisfaction, please click the "Accept as Solution" button below but if not please reply and we can continue the  discussion. Thank you!