Hello, I have latest version of K2 2.11.20230505 and latest Joomla 3 3.10.12. I have tried PHP 8 and 8.1 and frontend works fine but backend is broken. I get only white page and in logs I see this: [15-Oct-2023 21:24:25 UTC] PHP Fatal error:  Array and string offset access syntax with curly braces is no longer supported in /home/site/public_html/plugins/system/k2json/
How can I fix this so I can login to backend and so I can use PHP 8/8.1 because frontend works fine.
Thank you