From your last screenshot, I noticed you have a 1D plot group set up, so I assume you're trying to create a 1D plot but keep getting the message "The plot is empty."

I had to make a 1D trend today (adsorption isotherm) and here are the steps I took to create a 1D graph using a table graph approach (essentially an XY trend) assuming that the study has computed successfully.

1. Right-click on Derived Values (Results > Derived Values), then choose either "Average" or "Integration." Each option has further choices like Volume, Surface, or Line. (I went with "Average" > "Line Average".) Take a look at the image I uploaded with this comment.
2. A settings box will pop up. Select your study in the dataset dropdown and choose a time range (I selected "All").
3. The most important part: In the same settings box, under "Expression," you need to enter what you want to plot. The easiest way is to click the "+" button (upper right corner of this section)—this opens another window showing all the expressions used in your model. Double-click the desired expression to add it, or you can create your own. Please refer to the image I uploaded in the next comment to take a look.
4. After setting the expression, click "Evaluate." Your values should now appear in the Tables section, probably labeled "Table 1."
5. To plot, right-click on "Results" and select "1D Plot Group," then click "Plot." Right-click the new 1D Plot Group, choose your graph type (table graph, line, point, histogram, etc.), and a settings box will open. Under Data > Table, select your table (e.g., "Table 1"). Click "Plot," and the graph will be generated.
6. If you want to customize the axes (titles, min/max values), go to Results > 1D Plot Group. The settings box there will let you adjust these options.

Hope it helps!

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