maxu_pl wrote:So you think that apple should resolved any problems with all apps in internet which not work with OS ?
Not "in internet" (Xampp is not running "in internet"), but yes of course all apps that runned on the previous OS must run on the new OS. If Apple changes the OS, they have to ensure, that still all applications are supported which were running before. That is the very first MUST if you apply any changes to the Operating System. Its an absolutely "no go" if some applications are not supported any more.
When Microsoft updates Windows10, OF COURSE all applications have to work as before (at least also Xampp).
When Linux distributions are updated,OF COURSE all applications have to work as before (at least also Xampp).
This has to apply to all Operating Systems updates and of course as well for MacOS from Apple.
Last not least, as i see in your fix, that is NOT a problem with Xampp. Its a problem of the VirtualMachine (which hosts Xampp), which does not run anymore under Big Sur (not without certain modification). So that is a more global problem than only a Xampp problem.