Not sure if this still works but:

https://alexk111.github.io/DeBitpay/

Should pull the amount & address from the invoice.
Have not used it in a really really really long time but back in the day it did the job.

Humor:
Real life "really really really long time" = multiple decades
Internet time "really really really long time" =couple of years

-Dave

It seems it's related to CA certificate a connection authentication, according below

- https://electrum.readthedocs.io/en/latest/faq.html#i-might-run-my-own-server-are-client-server-connections-authenticated

I think the issue here is that your current Electrum server.
Have you tried to change your Electrum server first and test it again? That might be the reason why you got that error.

Not sure if this still works but:

https://alexk111.github.io/DeBitpay/

Should pull the amount & address from the invoice.
Have not used it in a really really really long time but back in the day it did the job.

Humor:
Real life "really really really long time" = multiple decades
Internet time "really really really long time" =couple of years

-Dave

It seems it's related to CA certificate a connection authentication, according below

- https://electrum.readthedocs.io/en/latest/faq.html#i-might-run-my-own-server-are-client-server-connections-authenticated

I think the issue here is that your current Electrum server.
Have you tried to change your Electrum server first and test it again? That might be the reason why you got that error.