Server permissions issue, I can’t upload files anymore in wordpress

Solution:

Assign yourself to the group that the files belong to.

For example, if your web files are owned by nobody and assigned to the group webgroup and your ftp user is finaldestiny then you would run the command usermod -a -G webgroup finaldestiny

You also need to make sure the folder and files are writable by the group, not just the owner. You can chmod -R g+w webroot to add write permissions to all files and folder in the webroot for the group.