Banner Life flagged as Phishing?

Hi, I recently completed an application with Banner Life/Legal&General. I got to the last step before payment, already reviewed my policy, just wanted to discuss it with family one last time prior to paying. A family emergency had just happened & I needed to wait a few weeks, we had enough on our plate. In that time I received countless emails, texts, and several phone call reminders & eventually had to escalate to a manager to get some peace with the assurance that yes I was still interested & won’t forget. Now, I can’t use the link to set up the policy. I have Norton antivirus on my phone & computer and it flags as a severe confirmed phishing threat.

Is the link just old (offer is held until the end of February)? Has it been compromised & should I call to get a new one?

Is the antivirus overreacting? It had no problem with anything previously.

Has Banner Life/Legal&General been compromised?

Thanks in advance