Recurrent Threat block notification by Avast Premium Security Web Shield

Hi

I have been using Avast for past 5 years. I am recieving recurrent notification of a threat being blocked by my Avast Premium Security at 10 minute interval since past few days.

I have followed the guideline for asking help and have attached the malwarebytes and FRST log files for perusal.
Kindly guide me on how to resolve this.