Hello. I can not connect to the bloks trails and events. In addition I can not run the experiment. Appears to me a flicker of a screen and then he disappeared.
I strongly recommend that you go through the SuperLab tutorial step by step. Your questions are all answered in there.
Regarding the “flicker”, that’s most likely a consequence of blocks and trials not being linked. SuperLab tries to run the experiment but finds no trials linked to a block, so it exits.