DOIs redirect to a generic journal page, not to article-specific pages

These DOIs (all from the same journal) redirect to a generic journal page, not to article-specific pages:

https://0-doi-org.lib.rivier.edu/10.38124/ijisrt/ijisrt24mar2109

https://0-doi-org.lib.rivier.edu/10.38124/ijisrt/ijisrt24mar1231

https://0-doi-org.lib.rivier.edu/10.38124/ijisrt/ijisrt24feb255

https://0-doi-org.lib.rivier.edu/10.38124/ijisrt/ijisrt24mar914

https://0-doi-org.lib.rivier.edu/10.38124/ijisrt/ijisrt24apr225

https://0-doi-org.lib.rivier.edu/10.38124/ijisrt/ijisrt24jun1897