Unable to download or update Apps

[IndyBob]

I am not sure where to post this so please move if necessary

Since I switched from a Brighthouse supplied cable modem to my own Arris modem I am unable to download or update apps from the App Store . It always looks like it is going download but I get a message that it can't download and to try later.

If I use a VPN connection then I can download. This happens with my iPhone and iPad. Any help would be welcome. Thanks

 

[Applejuiced]

Does it work fine to download and install apps on other wifi networks?
Sounds like it's a problem with your router/modem.
Try resetting the modem or reinstalling its firmware.
Is it a modem/router combo or you have a separate wifi router connected to it?

 

[IndyBob]

I have a separate Arris modem and a Eero mesh router. The only thing that changed was the modem so I suspect that is the problem. And yes, it downloads fine on other Wifi system or just on cellular. I restarted the modem and router but still no go.