Hi Aslain, i have the same issue, i tried your installer. Same thing happens...
Its only with the latest aslain mod.
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Edit: I did fall back to an older aslain mod, there everything is fine. 3.8.9
In the newest aslain 3.8.17 i saw that there is already this windows in the garage missing:
Dont know if this helps. My setting is eu server/english aslain/german wot