Twitter nagging

Several times over recent months, I've had this sort of message from Twitter. Is anyone else getting this? Or knows what might trigger it? I've taken the trouble to read their "Twitter Rules" but still have no idea.

At first, I suspected that it might be a whinge about my using a VPN, but this latest one happened when I haven't used a VPN for days.

It could still be the VPN, triggers for things on websites like that aren't always instant...

I'd also advise changing your Twitter password, on the off-chance someone else has access...

the "Pass the reCaptcha" thing indicates to me it's the VPN, as VPN's are often used by automated scripts (bots) and they usually ask for reCaptcha verification to confirm you're not a bot...