Spells do nothing after installing PRC

[Genervt]

Hi,

I installed PRC 3.5 and the Java CC 1.8. Made a wizard and went into the first Expansion.
Every time i cast a spell now it literally does nothing and in the textbox i get a yellow error message: "Skript prc_spell, OID:ffffffff, Tag; FEHLER: STAPELUNTERLAUF"
(im running the german version so i guess the last bit translates to "ERROR: STACKUNDERFLOW)
Already tried reinstalling (both game and PRC), installing ocfix and the 1.69 critical rebuild patch)

it doesnt even matter if its a vanilla spell or one added with the mod. Game is unplayable atm, pls halp.

[Mindflayer]

Did you install NWN + expansions, patch to 1.69, run the prc module updater and add both the prc pack and the OC fix to the OC campaign?