Unable to use pacman

still i install reborn os i was unable to use pacman e aur,the system update correct only from terminal,i try everything but still have error
Database synchronization failed
Failed to synchronize AUR database,even i disable aur

You seem to indicate that the commandline pacman ran fine. Where was the error in? In the GUI of pamac?

yes it dosen’t update or install any software anymore

Are you able to locate the console output or logs on the application and share the detailed log messages here? That would be helpful in diagnosing the problem.

what is the command line?

Commandline is a text prompt where you type and run commands. Terminal emulators (also just known as terminals) offer a commandline interface

and how i can find the log of pacman?

it’s to long and i don’t see anything strange or error

Apparently there should be something called “history” in the menus. Search for any information or errors related to package databases
Or share the logs here