Thank you very much for your response.
Until recently, the apps were working perfectly. For your information, I would like to share the following:
The only change I have made is to my Deco Mesh network; I switched from the Deco M5 to the Deco Mesh BE65.
The operating mode for my Deco is set to the default “Wi-Fi router” setting.
I am also using a new phone.
I have noticed a difference between using the web version on my PC and the app on my phone.
In the web version, the “data source monitor” does not work; the P2000 screen is visible, but the connection is lost.
On the phone, the “data source monitor” works, but the P2000 screen does not.
If this information gives you any ideas, please let me know. Unfortunately, my own technical knowledge is reaching its limit here. Best regards, Peter
@Peter_Grootveld KPN has a blocked the call to our server. Only way to fix that is changing the dns settings in your KPN modem. To for example google dns or cloudflare dns. Most of the time this makes your connection a bit faster as well. You can find a lot of info on internet about this
Recommended search term: KPN Google dns
I understand that this might be a bit technical but unfortunately we can’t do much about it.
Edit: I’ll check with @LRvdLinden if we can change the domain name, that might fix this. It’s KPN veilig which is blocking us
@Peter_Grootveld yes that’s exactly it. I made a DNS fallback for the APP. @LRvdLinden will share a update soon, after installing that you should be good to turn on “safe browsing” again
Blocked by your internet provider: some users stopped receiving P2000 alerts because the filter of their internet provider, such as KPN Veilig Browsen, blocked the P2000 server. P2000 now detects this and automatically switches to secure DNS-over-HTTPS, so the alerts keep coming in. The connection is still verified against the real P2000 server. Big thanks to @martijnpoppen for this fix!
Enjoy the latest version of P2000, now also reliable for users behind a provider filter!
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@martijnpoppen When I enable “safe browsing,” I stop receiving notifications. If I disable it, the notifications return. The report was generated after enabling the feature.
Update 6.2.6
Blocked by your internet provider: some users stopped receiving P2000 alerts because the filter of their internet provider, such as KPN Veilig Browsen, blocked the P2000 server. P2000 now detects this and automatically switches to secure DNS-over-HTTPS, so the alerts keep coming in. The connection is still verified against the real P2000 server. Big thanks to 
Enjoy the latest version of P2000, now also reliable for users behind a provider filter! 
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