It seems the latest branch of master/unicode does not support 1.13d any more , D2BS
1.5.1849,D2Bot Version 19.2.8.100 &18.12.12.100
you will need to use the 1.13d branch
Kolbot still supports 1.13d ?
it’s about old d2bot+kolbot files(before June 2017), and you can find them on
https://github.com/kolton/d2bot-with-kolbot/tree/patch-113d
or
https://github.com/kolton/d2bot-with-kolbot/tree/patch-113d-core15
till 18.6.15.200 branch ,it can be used by replace with 1.13d files(d2bs.dll [ v1.5.1849 seen in game] ,d2m.dll, d2bs.exe) to let it work on 1.13d client, only for single player mode.
version behind this seems not support it anyway.
and no 1.13c files can be used in a similar way like this;
for 1.13c patch you can try the older files, shared before d2bot+kolbot release, like d2bs-1.3.1.zip - d2bs-1.4.zip, on …/Diablo II/1.13c by checking GitHub - blizzhackers/bhfiles: www.bhfiles.com mirrors | other projects shared on www.blizzhackers.cc
for 1.13c patches maybe d2nt bot should be also checked https://github.com/mf022/D2NT-1.13c