Your USERS
tablespace is full. You may be able to free up some space by dropping something, possibly old objects - if this is a development environment in particular, see if you've been accumulating old objects in the recycle bin and purge any you no longer require.
If you can't fee up any space then you need to do what the error message tells you to do, add an additional data file to the tablespace, or increase the size of an existing data file, assuming you have sufficient disk space to do so.
The documentation has a section about managing data files, including adding data files and changing the size of existing data files. Which action is appropriate will depend on your circumstances, and you'll need to decide what size is appropriate. You might also want to consider creating a new dedicated tablespace for your application rather than using the USERS
tablespace, but again depends on your circumstances and needs.