It sounds like you may be encountering a technical issue while trying to generate a token. Without additional information, it's difficult to provide specific troubleshooting advice. However, one possible solution could be to clear your browser cache and cookies, and then try generating the token again.
Regarding your question about the tracking ID, it depends on which version of Google Analytics you are using. If you are using the newer Google Analytics 4, then you would enter the g-tag number (e.g. G-0K5RYTYZ11) as the tracking ID. If you are still using the older Universal Analytics, then you would enter the UA number (e.g. UA-26600668-1) as the tracking ID. UPSers Login