When borrowing a point from the server, such a situation will appear,"4050:Network license server error occurred,error code is 75. " How to solve the above situation?
I recommend you contact support and request repair package, but make sure to inform them what product you are using and license server version. Also, inform them if you are borrowing license to use while connected to the server or checking out a license from the server to use offline.
To get some sense of error codes, consider looking here.
From the documentation, it might one of four possible causes. A timeout issue is something you or the network admin should be able to fix. A version conflict is possible but hard to solve since it can depend on the version of the license server, the version of the VC product you are using as well as the key itself.