Well I installed all the tracks and updated Searspoint to 1.3.
Downloaded the League mod and installed without any errors, can see the mod ingame.
Yes, the error occurs after i type in the password but there is no difference when i type the mentioned one either.
I didn't get any problems adding any of the content or updating tracks when following the instructions listed in the forum.
Currently installed according to the rFactor 2 mod manager:
Watkins Glen - Version 0.2
Snetterton - Version 0.71
Searspoint - Version 1.3
RDWSR 1.0