Ensure your system date and time are set to "Set time automatically."
Licenses are time-sensitive. If your computer’s system date or time zone is incorrect (often due to CMOS battery failure or manual changes), the license may appear invalid. sap2000 license not recognized error 18 extra quality
Some versions require the number format to be set to to recognize the license properly. 3. Refresh the lservrc File (Standalone Licenses) Ensure your system date and time are set