Thanks for reaching out. We are sorry for the trouble with Adobe Lightroom. We are here to help.
Could you please share the version of Lightroom from Help >About Lightroom and the operating system version?
There seems to be an error (!) on the cloud icon. Are you running out of storage on the cloud? If you are about to or have already exceeded the storage, your recent import is yet to be fully synced.
You can also log on to Lightroom Web (https://lightroom.adobe.com) to check current Sync issues on the left part of the screen.
If there are any sync issues, click on them to know more, find the original for those images, and back them up safely before you empty the Sync issues from Lightroom Web. Sync issues usually indicate images that are pending to be synced or have metadata conflicts.
Let us know if this helps,