Tidal Connect won't launch

Hi there. I just downloaded Audirvana Studio (free trial) on my Macbook Pro running Mojave 10.14.
When attempting to connect Tidal it just launches a blank white (presumably) login page. I have restarted everything, no change. My account is the Admin account, the app has privileges.
I know it’s an older version of the OS but, other than updating that, are there any other suggestions to solve the Tidal linking issue? Thanks very much for any help.