Ok, it seems like the file /usr/lib64/mysql/libmysqlclient.so.16.0.0 and has a problem.
Rename the symbolic link in /usr/lib64/mysql :
cd /usr/lib64/mysql
mv libmysqlclient.so.16 libmysqlclient.so.16.bak
Check there are no other libmysqlclient.so.16:
find / -name libmysqlclient.so.16
If no other libmysqlclient.so.16 are found, get the 64 bit file from MTA and put it into /lib64 :
cd /lib64
wget [url=https://nightly.multitheftauto.com/files/x64/libmysqlclient.so.16]https://nightly.multitheftauto.com/files/x64/libmysqlclient.so.16[/url]