Unable to Analyze the Problem using OptiStruct

I am unable to perform any analysis on the OptiStruct Solver. I am getting the message as

OptiStruct ERROR: 1.
A fatal error has occurred in your model. Please refer to the .out
file to obtain more information on how to correct it.

License error:
Altair License Manager: License error
Feature(s): GlobalZoneAP, HyperWorks, HWOptiStructFEA
Error Code: 9
Error Description:
Feature not found
Feature: OptiStructFEA
Error Code: 6
Error Description:
[LOCAL] \Altair Hyperworks\HyperWorks\altair_lic.dat - (Err: 9) Feature not found
[LOCAL] C:/Program Files/Altair/2020-edu/security/altair_lic.dat - (Err: 6) Unable to read file
License Path: C:/Program Files/Altair/2020-edu/hwdesktop\security\altair_lic.dat;D:\Altair Hyperworks\HyperWorks\altair_lic.dat;C:/Program Files/Altair/2020-edu/security/altair_lic.dat
License error:
Altair License Manager: License error
Feature(s): GlobalZoneAP, HyperWorks, HWOptiStruct
Error Code: 9
Error Description:
Feature not found
Feature: OptiStruct
Error Code: 6
Error Description:
[LOCAL] \Altair Hyperworks\HyperWorks\altair_lic.dat - (Err: 9) Feature not found
[LOCAL] C:/Program Files/Altair/2020-edu/security/altair_lic.dat - (Err: 6) Unable to read file
License Path: C:/Program Files/Altair/2020-edu/hwdesktop\security\altair_lic.dat;D:\Altair Hyperworks\HyperWorks\altair_lic.dat;C:/Program Files/Altair/2020-edu/security/altair_lic.dat

If possible can anyone help me. I have tried some of the tips in Forum but those didn't work. Please help as it is required soon. I tried to reinstall the application also.