Had similar issue with Chromium on Unstable Branch, after system upgrade Chromium will no longer launch. “libre2.so.10” had be replaced/upgraded to “libre2.so.11”.
Luckily kept copy of “libre2.so” “libre2.so.10” and “libre2.so.10.0.0”. Copied “libre2.so.10” and “libre2.so.10.0.0” to /usr/lib/. This resolved the Chromium launch issue on Unstable Branch.
I have uploaded it to MEGA.NZ