Plex PS4/Web app not working

New user here. Just bought my wd cloud 2tb drive

I activated the plex app and copied my movies to the folder.

I was able to watch on Ipad/iphone/pS4 and plex web app.

After a day, the ipad and iphone wanted me to sign to plex plus. so I have deleted the apps.

But the plex ps4 and web app are now no longer syncing or streaming.

Movies stream fine from within the my cloud app on iphone, ipad or laptop

Please help?