Yes, only 0 errors are acceptable, and even that not a guarantee there's aren't issues, but any errors is a guarantee there are.
Looks like you need an updated GLIBC, download this one, also to the extra folder, then reboot:
http://ftp.riken.jp/Linux/slackware/slackware64-current/slackware64/a/aaa_glibc-solibs-2.33-x86_64-2.txz