Pirate sites are notorious for "malvertising"—ads that automatically download viruses or ransomware to your phone or PC.
The good news is that Devon Ke Dev... Mahadev is readily available on official platforms, often for free or at a very low subscription cost. This is the primary home for the series.
: If you're interested in the series, "Devon Ke Dev... Mahadev" is known for its engaging storyline, featuring the divine and human aspects of Lord Shiva's life, along with other characters from Hindu mythology.