What is the version of Ubuntu? and did you follow the procedure exactly like in the guide? (see below)
sudo apt -y update && sudo apt -y install build-essential libssl-dev libdb++-dev libboost-all-dev libcrypto++-dev libqrencode-dev libminiupnpc-dev libgmp-dev libgmp3-dev autoconf autogen automake libtool autotools-dev pkg-config bsdmainutils software-properties-common libzmq3-dev libminiupnpc-dev libssl-dev libevent-dev
sudo add-apt-repository ppa:bitcoin/bitcoin
sudo apt-get update
sudo apt-get install libdb4.8-dev libdb4.8++-dev -y
git clone
https://github.com/sucremoneda/SucreCore.gitcd SucreCore
find . -name "*.sh" -exec sudo chmod 755 {} \;
./autogen.sh
./configure # or ./configure --without-gui
make
Going to try today later, but wasn't easier to replace directly in the repo the secp256k1 folder?