- Your serial number and authorization codes don't match the SketchUp Pro version you are trying to authorize (2017, 2016, ...). Make sure they do! Read your e-mail with your license codes carefully!
- The serial number of version 2019 starts with U
- The serial number of version 2018 starts with T
- The serial number of version 2017 starts with S
- The serial number of version 2016 starts with R
- The serial number of version 2015 starts with Q
- The serial number of version 2014 starts with P
- The serial number of version 2013 starts with N
- The serial number of version 8 starts with M
- The serial number of version 7 starts with L
- The serial number of version 6 starts with K
- The serial number of version 5 starts with J
- The serial number of version 4 starts with I
- The serial number of version 3 starts with G
- The serial number of version 2 starts with F
- You are offline: you must have a working internet connection during authorization.
- You do not have the proper rights: right-click on the SketchUp Pro short cut icon and choose Run as Administrator (Windows). On Mac, make sure you drag the SketchUp Pro folder from the disk image to your Applications folder!
- Internet ports 80, 8080, 443, 5053 and 50530 are closed on your network: these must be open in your firewall.
- Domains *.sketchup.com are not accessible: make an exception for domains *.sketchup.com in your firewall.
- Domain *.google.com is not accessible: make an exception for *.google.com in your firewall.
- There are problems with your browser. SketchUp Pro uses your system internet browser for showing some screens, which is always Internet Explorer on Windows and Safari on Mac, even if you use another by default!
- Update Internet Explorer or Safari to the latest version;
- Make Internet Explorer or Safari your default browser (at least for now);
- Enable Java on your system;
- Reduce the security settings for internet access;
- Empty the browser cache for Internet Explorer or Safari;
- Clear the browser cookies for Internet Explorer or Safari;
- You are using a proxy: no solution at this time, unfortunately proxies are not supported.