Problem with pacman in Arch Linux Proot

[mighty thicket]

I installed arch linux using proot according to the official documentation, but I can't use pacman. It always gives the following error.

it's in Portuguese. Translated into English it would be as follows:

root18:14~$ pacman -Syu :: Synchronizing the package database... core.db failed to download error: failed to get file "core.db" from archlinux.c3sl.ufpr.br : The requested URL returned error: 404 error: failed to get file "core.db" from www.las.ic.unicamp.br : error: failed to get file "core.db" from pet.inf.ufsc.br : Resolving timed out after 10000 milliseconds error: Failed to get file "core.db" from de4.mirror.archlinuxarm.org : Resolving timed out after 10000 milliseconds error: failed to sync all databases (download library error)

I already tried to remove the lock and I already manually put mirrors in the mirrorlist, and the result was the same.

[mighty thicket]

I managed to solve the problem: I cloned the github repository and, in termux, I used bash setupTermuxArch.sh refresh automatically pacman started to install the programs. Note: The problem occurred to me using the first method listed at https://termuxarch.github.io/TermuxArch/docs/install.html