Academic difficulties can happen at any time. For many, the transition from school to university requires a period of adjustment. The old ways of learning from high school may no longer work. Or perhaps you always managed to get through school without a lot of effort. At university, it's different - the workload is higher, as is the amount of time you need to devote to studying in addition to your lectures. You might not have found the best way to structure your week, or you could need a new study method to help you cope with the material. You may need to relearn how to research or write an academic paper that meets your instructor's requirements. Another problem may be motivation and procrastination. Exam nerves can cause you to not be able to recall what you have learned at the right time.
The university has many support services to help you deal with these issues: