I was going through the APEX 18.1 Basic Demo Projects Hands-On Lab (v1.0.0). After I created a maintain project page(P9) for the projects page(P3) and clicked the 'save and run', in the Runtime environment, clicked one of the Project cards.I got this error message:
No checksum was provided to show processing for a page that requires a checksum when one or more request, clear cache, or argument values are passed as parameters.
Could anybody help with this problem?