I had been running openSUSE Leap 15.1, and a few days ago decided to update to openSUSE Leap 15.3 using the normal upgrade process outlined at https://en.opensuse.org/SDB:System_upgrade. Everything appeared to upgrade fine. However, no my Apache2 install will not start, giving me this error message:
start_apache2[8413]: /usr/sbin/httpd-prefork: symbol lookup error: /usr/sbin/httpd-prefork: undefined symbol: apr_thread_mutex_timedlock
I have verified that libapr1 and libapr-util1 are both installed and located in /usr/lib64/. I even deleted the lamp_server pattern and reinstalled it, with no change in the error message. My system is running on a VM on my QNAP NAS, and has been running fine on that at various Leap versions for several years, most recently at 15.1.
Where is the next thing to check for this issue? I do this sort of stuff for work, but this has me baffled.
Thanks, Tim