The Great Twin Cities Treasure Hunt — CLUE #8

[Johannes]

CLUE #8

Red, blue, orange, yellow, green—you'll need a purple line,
To hitch a ride across the town and find our mini-shrine.
Make a retreat down alphabet street (after you navigate);
Check it all out! Better look now or it just might be too late.

[Clue Master]

No smilies permitted. ?️‍?

[Johannes]

There must be something wrong with the machinery.

Thanks for the heads up! I'll take a look.