The DoH won't work no matter what I do

I'm trying to use DoH specially #NextDNS but it won't work no matter what I do ,like : flushing DNS of the router - remove IPv4 dns  - disabling one of the route-mark mentioned above ,installing certificates from (https://dns.nextdns.io/) and (https://curl.se/ca/cacert.pem) and NTP is enabled (/system sntp client set enabled=yes primary-ntp=132.163.97.1 secondary-ntp=132.163.97.1) but the DoH just won't work ...

/ip dns static add name=dns.nextdns.io address=45.90.28.0 type=A
/ip dns static add name=dns.nextdns.io address=45.90.30.0 type=A
/ip dns static add name=dns.nextdns.io address=2a07:a8c0:: type=AAAA
/ip dns static add name=dns.nextdns.io address=2a07:a8c1:: type=AAAA
/ip dns set use-doh-server=“https://dns.nextdns.io/******” verify-doh-cert=yes

here are the error log of DoH :
"DoH server connection error: SSl:internal error (6)
DNS: DoH Server connection error: SSL:internal error (6)"

If there is a work around please let me know ...