Failed to open MySQL client library

You may encounter this error message when trying to backup mysql database using Veeam agent for Linux

"Failed to open MySQL client library"

Few thing to check

1. Make sure it is supported mysql version : 5.7 - 8.0

2. Correct credential. Use MySQL Workbench to access from VBR to source database server

3. Install libmysqlclient package manually on source database server

Execute command:

sudo apt-get update
sudo apt-get install libmysqlclient-dev

4. Rerun backup

That should do the trick!