Once you have fixed the error, follow these best practices to avoid a recurrence:
Debian/Ubuntu:
sudo apt update
sudo apt install --reinstall valgrind
RHEL/Fedora:
sudo dnf reinstall valgrind
Arch Linux:
sudo pacman -S valgrind
From source (if package too old):
wget https://sourceware.org/pub/valgrind/valgrind-3.23.0.tar.bz2
tar -xjf valgrind-3.23.0.tar.bz2
cd valgrind-3.23.0
./configure --prefix=/usr
make
sudo make install
sudo ldconfig
If you've recently installed new software or drivers, try disabling them:
Conclusion
Note: If this fixes the error, you can either keep Memory Integrity off (not recommended for high-security needs) or wait for the developer to sign their driver properly.
Also, ensure Controlled Folder Access is not blocking the game: how to fix unable to load vgcore error code 127 new