There must be 2 accounts in /etc/letsencrypt/accounts/acme-v02.api.letsencrypt.org/directory - you should remove one of them. What is the output of Code: ls -la /etc/letsencrypt/accounts/acme-v02.api.letsencrypt.org/directory
Code: ltotal 16 drwx------ 3 root root 4096 Nov 18 2019 . drwx------ 3 root root 4096 Jul 16 2019 .. drwx------ 2 root root 4096 Jul 16 2019 619364c290bbf70797a4f50e39731642 lrwxrwxrwx 1 root root 97 Nov 18 2019 8d5320aef37cae3f4a9aebacf659fbec -> /etc/letsencrypt/accounts/acme-v01.api.letsencrypt.org/directory/8d5320aef37cae3f4a9aebacf659fbec UPDATE: It's working!! I removed 619364c290bbf70797a4f50e39731642 then run ispconfig update and now i have access to panel again, thanks