Just trying to install 9.1.3 on mint 21 with php8.1
Installing with Atomik works fine.
When I install with Elemental I get exactly the same error as reported in Github.
Error: “Fixed error when installing Elemental on PHP 8 (Version 9 Elemental Theme Error PHP8 · Issue #10003 · concretecms/concretecms · GitHub)”
This error still exists on my set up. The screen shot of the error message which is no Github is exactly what I get with 9.1.3