I tried Improved(144) Qt6 on Fedora 44.
but no run. log001 not shown.
I was helped by AI.

@fedora:~/CqrlogImproved$ strace -f -e trace=openat /usr/bin/cqrlog 2>&1 \
| grep -E 'libmysqlclient|libmariadb'

[pid 75985] openat(AT_FDCWD, "/lib64/libmysqlclient.so", O_RDONLY|O_CLOEXEC) = -1 ENOENT (not found)
[pid 75985] openat(AT_FDCWD, "/usr/lib64/glibc-hwcaps/x86-64-v4/libmysqlclient.so", O_RDONLY|O_CLOEXEC) = -1 ENOENT (not found)
[pid 75985] openat(AT_FDCWD, "/usr/lib64/glibc-hwcaps/x86-64-v3/libmysqlclient.so", O_RDONLY|O_CLOEXEC) = -1 ENOENT (not found)
:

@fedora:~/CqrlogImproved$ sudo ln -s /usr/lib64/libmariadb.so.3 /usr/lib64/libmysqlclient.so　（important)

In my PC /usr/lib64/libmysqlclient.so does Not exist, but /usr/lib64/libmariadb.so.21