Opera does not upgrade or install in Exe Gnu/Linux (and devuan also), because it has different libgbm version. The fix is to make a custom installation package and install that package. Unfortunately Opera needs to upgrade by hand by making a package (or Opera fixes their package).

The Fix:
1. Download Opera from https://www.opera.com/fi

2. Extract the package and edit DEBIAN/control file like

3. Set permissisions for root
sudo chown root:root -R opera-stable_68.0.3618.165_amd64-fixed

4. Make a fixed package
sudo dpkg -b opera-stable_68.0.3618.165_amd64-fixed opera-stable_68.0.3618.165_amd64-fixed.deb

Read also: Opera 51 installation fix in Mint 17, LMDE and Ubuntu 14.04 based systems

Edit 20.7.2020: With mint 18 and Ubuntu 16.04 Opera does not upgrade, so I made a fixed package for them.

Edit 22.10.2020: The newest fixed version
opera-stable_72.0.3815.148_amd64-fixed.deb.

A part of edited DEBIAN/control file

Depends: libasound2 (>= 1.0.16), libatk-bridge2.0-0 (>= 2.5.3), libatk1.0-0 (>= 2.2.0), libatspi2.0-0 (>= 2.9.90), libc6 (>= 2.16), libcairo2 (>= 1.6.0), libcups2 (>= 1.7.0), libdrm2 (>= 2.4.38), libexpat1 (>= 2.0.1), libgbm1, libgcc1 (>= 1:3.0), libgdk-pixbuf2.0-0 (>= 2.22.0), libglib2.0-0 (>= 2.39.4), libgtk-3-0, libpango-1.0-0 (>= 1.14.0), libpangocairo-1.0-0 (>= 1.14.0), libx11-6 (>= 2:1.4.99.1), libx11-xcb1, libxcb-dri3-0, libxcb1 (>= 1.6), libxcomposite1 (>= 1:0.3-1), libxcursor1 (>> 1.1.2), libxdamage1 (>= 1:1.1), libxext6, libxfixes3 (>= 1:5.0), libxi6 (>= 2:1.2.99.4), libxrandr2 (>= 2:1.2.99.3), libxrender1, libxss1, libxtst6, debconf (>= 0.5) | debconf-2.0, libudev0 (>= 147) | libudev1 (>= 183), libnspr4 (>= 1.8.0.10), libnss3 (>= 3.14.3), gnupg (>= 1.4.1), libcurl3 (>= 7.16.2) | libcurl4 (>= 7.58.0), libdbus-1-3