pdf error msg - "The server has an invalid SSL certificate"

[ASongULove]

I've used acrobat reader for years to pay utility bills online.

Today I tried to pay my monthly bill and got the following msg -
"An error occurred during the submit process. The server has an invalid SSL certificate."

This has never happened before.

I'm not a very tech-savvy person.  What does this mean, and how do I fix it?

(I'm on mac, with the 11.0.23 version of reader)

Thanks for your help!

[Bernd Alheit]

May be the certificate of the web server is not more valid.

[ASongULove]

hi - i hate to say this, but i don't actually know what that means...
where/how do i find this certificate?  what can i do about it.  pretend i literally know nothing about this. 
any help that can offered, in layman's terms (think a small child...honestly, I'm not a computer guy...)

thanks!

[Bernd Alheit]

Contact the provider of the service.

[ASongULove]

you mean the internet provider, or adobe?  i tried calling adobe - they told me to post here, and that no phone assistance was provided for this product.

[Bernd Alheit]

internet provider

[Steve Cordero · Accepted solution]

Which ever Utility has the server exhibiting the behavior should be contacted.  A lot of web browsers and other internet aware applications will now throw errors if the SSL certificate is expired/invalid.  Their IT/Web Group should be able to update the certificate and then their users won't get that message when they are attempting to pay their bills or browse their secure web site.