Hello there,
I have the exact same issue on a brand new Windows Server 2019 after MagicInfo complete installation.
The login page displayed correctly on "http://localhost:7001/MagicInfo" but, as soon as I log in, I'm stuck on a blank "http://localhost:7001/MagicInfo/j_spring_security_check" webpage.
I'm sure the credentials admin / admin2016 are corrects (double checked in the MISInformation file)
PostgreSQL v13
MagicInfo Server 7100.2_A
Thank you to anyone who is able to help me
THI