error

i'm trying to run mlmmj web interface on ubuntu 22.04 php 8, but getting many errors:
`[Sun May 21 15:15:00.733845 2023] [php:error] [pid 14979] [client 172.16.1.20:52156] PHP Fatal error: Array and string offset access syntax with curly braces is no longer supported in /usr/share/mlmmj-php-web-admin/htdocs/class.rFastTemplate.php on line 477
[Sun May 21 15:19:40.092857 2023] [php:error] [pid 15028] [client 172.16.1.20:52226] PHP Fatal error: Array and string offset access syntax with curly braces is no longer supported in /usr/share/mlmmj-php-web-admin/htdocs/class.rFastTemplate.php on line 477
[Sun May 21 15:21:58.065835 2023] [php:error] [pid 15029] [client 172.16.1.20:52285] PHP Parse error: syntax error, unexpected token ";", expecting "]" in /usr/share/mlmmj-php-web-admin/htdocs/class.rFastTemplate.php on line 477
[Sun May 21 15:21:59.012441 2023] [php:error] [pid 15030] [client 172.16.1.20:52286] PHP Parse error: syntax error, unexpected token ";", expecting "]" in /usr/share/mlmmj-php-web-admin/htdocs/class.rFastTemplate.php on line 477
[Sun May 21 15:22:39.395161 2023] [php:error] [pid 15031] [client 172.16.1.20:52304] PHP Fatal error: Array and string offset access syntax with curly braces is no longer supported in /usr/share/mlmmj-php-web-admin/htdocs/class.rFastTemplate.php on line 493
[Sun May 21 15:23:15.900956 2023] [php:error] [pid 15032] [client 172.16.1.20:52320] PHP Fatal error: Array and string offset access syntax with curly braces is no longer supported in /usr/share/mlmmj-php-web-admin/htdocs/class.rFastTemplate.php on line 537
[Sun May 21 15:24:12.548771 2023] [php:error] [pid 15028] [client 172.16.1.20:52343] PHP Fatal error: Array and string offset access syntax with curly braces is no longer supported in /usr/share/mlmmj-php-web-admin/htdocs/class.rFastTemplate.php on line 537
[Sun May 21 15:24:13.430432 2023] [php:error] [pid 15033] [client 172.16.1.20:52344] PHP Fatal error: Array and string offset access syntax with curly braces is no longer supported in /usr/share/mlmmj-php-web-admin/htdocs/class.rFastTemplate.php on line 537
[Sun May 21 15:24:35.528319 2023] [php:error] [pid 15029] [client 172.16.1.20:52351] PHP Fatal error: Array and string offset access syntax with curly braces is no longer supported in /usr/share/mlmmj-php-web-admin/htdocs/class.rFastTemplate.php on line 553
[Sun May 21 15:25:07.790851 2023] [php:error] [pid 15030] [client 172.16.1.20:52359] PHP Fatal error: Uncaught Error: Call to undefined function each() in /usr/share/mlmmj-php-web-admin/htdocs/class.rFastTemplate.php:344\nStack trace:\n#0 /usr/share/mlmmj-php-web-admin/htdocs/index.php(34): rFastTemplate->define()\n#1 {main}\n thrown in /usr/share/mlmmj-php-web-admin/htdocs/class.rFastTemplate.php on line 344
`
the curly braces error solved reemplacing {} by [] but the las line error... nothing to do.....
my virtual hostDocumentRoot point to /usr/share/mlmmj-php-web-admin/htdocs
i'm missing someting thanks