Nginx and DuckDNS stop workink

Hi everyone!

I am a beginner in Home assistant and networking, specially in networking.
A few days ago, suddenly the Nginx stop working.
I can access the home assistant from LAN with the local http address, but I can’t acces from WAN with https duckdns address.

In Nginx I get the following message.

2021/08/25 12:21:08 [crit] 221#221: *86 SSL_read() failed (SSL: error:14191044:SSL routines:tls1_enc:internal error) while processing HTTP/2 connection, client: remoteaddress, server:

Please, someone help me!