First of all, I would like to thank @
Marko999x for this thread. It is literally pure gold. Recently, I started playing around again with my old servers (8.4 and 8.6), and they don’t have anything custom — it’s the original CipSoft client. I played some 8.6 baiak servers and noticed that they have a lot of updated content, with monsters and items from version 10.x or higher, including walls, floors, and other assets from RME, which sparked my interest in this area.
I experimented a bit and managed to add some sprites from version 10.x (Sanguine/Soulwar) into my 8.6 server. However, when I moved on to RME, I ran into the following issue: even doing everything correctly in OBJECT BUILDER, after compiling, when I open the client and log in, it goes into an infinite debug loop with the error message attached. Does anyone know how I can fix this?