Try reinstalling rspamd
sudo apt remove rspamd -y
CODENAME=lsb_release -c -s
sudo mkdir -p /etc/apt/keyrings
wget -O- https://rspamd.com/apt-stable/gpg.key --no-check-certificate| gpg --dearmor | sudo tee /etc/apt/keyrings/rspamd.gpg > /dev/null
echo "deb [arch=amd64 signed-by=/etc/apt/keyrings/rspamd.gpg] http://rspamd.com/apt-stable/ $CODENAME main" | sudo tee /etc/apt/sources.list.d/rspamd.list
echo "deb-src [arch=amd64 signed-by=/etc/apt/keyrings/rspamd.gpg] http://rspamd.com/apt-stable/ $CODENAME main" | sudo tee -a /etc/apt/sources.list.d/rspamd.list
apt-get update
export DEBIAN_FRONTEND=noninteractive
apt-get --no-install-recommends install rspamd -y
