While updating to Mobilizon version 4: Version 'GLIBC_2.34 not found

/opt/mobilizon# version `GLIBC_2.34’ not found (required by /opt/mobilizon/erts-14.1.1/bin/erlexec)

who can help? 2.31 is installed

What’s the system version Mobilizon is installed on? I’m guessing Debian Buster?

The latest packages are only available for some specific versions of Debian. I will recreate a build for this distribution in the next bugfix version, but you should consider upgrading.

Debian 11 is installed

ok, then I will upgrade the system debian now , and install Mobilzon directly with 4.0

You can also just make sure to use the package for bullseye: