Firefox and Chrome - increased invalid certificate, Connection not secure, Connection not private messages

[roattw]

All of a sudden people are reporting an increase in those Firefox and Chrome warnings for our sites like invalid certificate, Connection not secure,  Connection not private messages. 

Firefox reports the certificate/connection not secure:

 

Chromes seems to give the Connection not private:

 

All embeded code and URLs reference https:   Not sure how to avoid this, or why all of a sudden its started.

Thoughts?  Many thanks!

[Alison]

Hi @roattw,

As I could see this site is built on Weebly. According to their technical support, they were forced to block some countries, for example, Russia, due to security reasons. 

[roattw]

Odd.  These are all US people though accessing these sites.