The error in the schematic was that the neutral side of the load had to be connected directly the neutral side of the AC and not in junction with the snubber circuit.
There error is in the fact that whoever made the schematic did not designate Line (hot) or Neutral.
That being said, what, pray tell , is a "Neutral side of load" ?
What kind of ac load is "polarized" such that it matters which side is neutral ?
(certainly not a motor or a lamp or any number of other ac loads)
A computer would be an exception to the extent that the computer power cord is probably "keyed" so as to go in only one way.
What (exactly) IS the load ?
A little confused with the BTA08 TRAIC. Attached is my schamatic. I've mpt connected the load but have mentioned it.
Nothing in your post suggest that you actually tried powering it before marking the post "solved". You never did say what the load was or that you had tested it. What makes you think it matters how you connect it ? (L, N) or (N, L)
Also, as I mentioned , in order to mark a post "solved" you need to edit the post title of the ORIGINAL POST , (not a "reply") and change it to "[SOLVED] etc. etc. etc. " which you still have not done.
FYI, in case you aren't aware, the fact that the person who drew the schematic does not have the GNDs pointing DOWN is an indication of inexperience, at least with schematic conventions, since all schematic drawn by professionals show GND pointing DOWN and any Vcc pointing UP. (GND should NOT be pointing UP or LEFT or RIGHT). It should be pointing down. It is the responsibility of the person making the schematic to use connecting line to accomplish that so there is no excuse (other than pure inexperience) for doing that. Also, the 7805 regulator circuit is upside down. There's no current limiting resistor in series with the power on indicator led on the output of the regulator.