I you are unable to login to the MBI vendor (mindgarden) that is an embedded webpage from this site here are a few tips:
make sure are using the correct email (check with B.Wiederhold if you are not sure which email has a license allocated)
you are using a device that has a security block preventing accessing webpages embedded within another page... this is common on public computers and any device running security filters. If this is the case, use one of the links below to copy/paste the URL into a new browser