12.21.1 now available

Enhanced

Increased Let’s Encrypt initial connection timeout.
Improvements to Polish language pack.
Altered RPC keepalive strategy for transfer of backup data between servers.
“Built in” PHP extensions displayed in website dashboard now include compulsory extensions loaded at runtime in addition to those compiled in to PHP.

Fixed

Unix username generation for numeric domains of more than 8 characters in length.

Adam Unix username generation for numeric domains of more than 8 characters in length.

Finally. Thank you