1. Approval time: On the study pass, some closed courses may need to wait for grades or approval to determine whether you meet the closing conditions. During the review period, the corresponding final course may be temporarily locked. Please check your completion requirements and passing time to ensure that the course review has been completed.

2. Consult the counselor: If your final course cannot be automatically unlocked, please consider contacting the counselor of the course to explain your problem in detail. Counselors usually check your submitted tasks, papers or other requirements, as well as other factors related to grading, and give a response.

3. Change your account login: Sometimes, there may be problems with your login process and account permissions. You can try logging in with another account to see if the problem is solved. If the course is available, it is likely that there are some restrictions or other problems in your account that prevent the course from being unlocked.

4. Contact the technical support of the school or online education platform: If your final course still cannot be unlocked, please try to contact the technical support personnel of the school or online education platform directly to get the corresponding technical support and guidance services to solve this problem.

It should be noted that when operating online courses during the after-sales period, please keep relevant learning materials and supporting documents, and ensure that your operation methods and results meet the relevant regulations and requirements of the school or online education platform.