I first tried on my mobile i want to download it on mobile for a watch only wallet, but the link came up as not found, So i checked the link on my pc also and got the same result so its not working for me on pc and mobile..the link that is...
I believe there is something preventing your device from accessing the Electrum PlayStore URL.
Since the error appears not found you can try changing your device DNS to Cloudflare or Google DNS to bypass the issue.
You can also try using a VPN just to download Electrum from playstore.