WhatsApp not working on WiFi

[SteveA3]

So I've tried everything, rebooting router, and IPhone. Checking BB shield, deleting WhatsApp completely and reinstalling (without restoring content even).

It then worked for one message then decided to not work again. All I get is "connecting" on the phone.

I've exhausted all information available for this problem on Sky and other help forums.

I have been getting weak security warnings, but having SkyQ which is defaulted at WPA2 etc, there is a known issue with Apple devices stating weak security when it's not.

[SteveA3]

Actually second part, TikTok, Instagram also not working. But things like YT and Facebook are?????