Wormwood Catacombs. [Fire Ball Teleporter Room - Update]

[Sir Tawmis]

Gentle bump, in hopes of help - still at the steel door.

[minmay]

Solution:

SpoilerShow

The note says:

Under
and under
and over
and all over again
and over

Step on the square under the bridge twice, then on the bridge once, then on the square under the bridge twice, then on the bridge twice.

[Sir Tawmis]

Got it, thank you! I was not doing the final two steps...!

Now I am trying to figure out the fire ball teleporter room...