Its working fine here https://udahiliportal.com/jobs/jobs-at-world-vision-tanzania-2/
13 Job Opportunities at STAMICO, TPB, DMI, MNMA, MUCE, TCB, TICD
It has nothing to do with WordPress 5 nor it is theme related, my guess is: it is because of the pdf embed on that specific page, try removing it and publish again.