When you try to edit existing application the related fields are missing as shown below
Api Portal 3.5
1. Files under /opt/Deployments/lrs/repository are not owned by l7portal user
2. Corrupt index file
1. If files under /opt/Deployments/lrs/repository are not owned by l7portal user run the below command
# chown -R l7portal:portalusers /opt/Deployments/lrs/repository
2. Force a reindex of the content by moving /opt/Deployments/lrs/repository/INDEX to /opt/Deployments/lrs/repository/INDEX.backup and restarting the portal.