I have looked at the picture of your circuit. It appears to me (if I am seeing this correctly) that at the point where you have Vcc tied in the label on the part says Vss. This may be mislabled on the IC symbol and could be what is causing your error. You could try changing the symbol labeling and see if that is what is actually causing the error or not.
Other than what I have observed from the photo I can't speculate as to what is happening without looking at your model file for the part in question.
Every component you want to simulate needs a model and you don't have one. Multisim is a SPICE simulator so go to the manufacturer website and see if the have one available for download. If they don't have it, you have to build an equivalent circuit using parts available from the Multisim database.
The SPICE model is just a text file you should be able to open it with Notepad. I am not sure what software will open the OLB file you downloaded but I don’t think it will have the model in there.