Good afternoon! After the last update of krastorio 2 There was a conflict with your mod. Here is the boot message:

Failed to load the following mods: Missing sound when loading sound library: Krastorio2 /sounds/weapons/rocket-launch.ogg
Disable Modes:
• spidertron-extended-se (O.3.9)

Thanks!

Apparently - this mod will have to be forgotten ... sad ... :(

I found the solution to the problem in the next branch: https://mods.factorio.com/mod/spidertron-extended-se/discussion/615fd0ab3d8b69f6125cc602

It is a pity that the owner of this mod abandoned it ....

If anyone else is noticing this post, the latest version of normal spidertron extended should be compatible with Krastorio2.