@joe98 how did you get there? Is this near the beginning of the level?
Are both extended? Have you retrieved the blue portal gun yet?

If one of them is not extended, you can hold control (CRTL) to crouch

Have you tried placing a blue portal on a nearby portal surface? I know for a fact you have access to one. Tell me if it is open.

Once again, what do you do before you wind up in this situation? Do you find yourself here every time?

Stuck behind one of those long arms that pushes a panel a great distance.

@joes98, could you describe your surroundings? Like, what objects you can see, and what the last thing you did was?

There should always be at least 1 orange portal active at a time, unless you reached the end.
If you don't see the "yellow" portal, then try placing a blue portal on a nearby surface. If you can see through the blue portal, then there is a "yellow" portal somewhere else, it's only moved to a different place. Otherwise, there's some sort of bug.

There are no mazes in this map, (maze being a series of branching pathways, some of which lead nowhere) but I'm guessing what you're saying is you got turned around?

The final puzzle connects two different chambers together, that's the only place I think you could get a bit turned around. The rest is pretty straight forward.

I found myself in a maze and then the yellow portal closed so i can't go any further

Interesting new element! Havent seen it before. The puzzle in the last room was pretty good. I was way too confused about how to get the cube from the button in the last room back to the first room. The introductory room could have been simpler. At first I did not notice that the cube was being teleported and not destroyed. The mess of connection lines added to the confusion. Also the strange fizzler that is like glass and all the doors in the last room that never open, but they contributed to the curious, eer ie mood. Also the unaccessable back room of the first room, but in the end it was great! I had a bug, where a cube immideately got destroyed after I teleporterted it on the button in the last room. The companion cube was great!

Everybody's got to start somewhere, and I've seen much worse intended solution ? There are obviously quite a few things that should be fixed, but it shows promise - good luck.