Builder hangs when I add a new block

I have a fairly large algo that I have worked with for several months.

I don´t know how many blocks, but it is several houndred, with a lot of custom indicators.

Today, suddenly when I try to add a new code block - the whole systems hangs. There is an infinite "Loading...." message.

I have tried to remove some unnecessary code if this should have been caused by the size of my code, but that did not help.

Does anyone have a solution to this?

My EA is getting quite complex and I need to put some explanatory text near the code blocks, but I can not figure out how to do this.

If i look at section "Tutorial by users" and "Tutorial 01 - EMA cross, part 1 [beginners]", I find several note blocks close to the code blocks. Could you please tell me how to do this?