Student Catia no suitable license issue

Hi

I purchased both CATIA STUDENT V5-6R2020 and CATIA STUDENT V5-6R2017 in the year 2020. However, starting in 2021, I failed to open any versions of my CATIA.

Every time I tried to open them, there would be a License Manage window pop up and states quote "There is no suitable license to fulfill the CS1 request", and a second License Manage window pop up and states quote "No License Available for Requested Configuration(s) Click OK and select at least one valid configuration license using the License Manager dialog box", I clicked OK and in the dialog box I wasn't able to select any license as my Active Server.

Would anyone tell me why these happened and how I can be able to re-use my CATIA?

Edu ​​​​​​​3DEXPERIENCE ​​​​​​​CATIA V5 ​​​​​​​