Reflash latest ColorOS to both A/B slots:

#Download firmware from: https://sourceforge.net/projects/oneplus13flashers/files/Oneplus%20Ace%205/Super%20Flashers/
#Reboot phone into fastboot mode with Volume Down + Power
./Super_Flasher_COS.bat
#Reboot into fastbootd mode, choose English
#Do you want full chinese bloat?: [Y,N]?N
#Are you flashing from ColorOS or Want to WIPE DATA?? (y/n)y