When i run forge installer everything seems to be ok, i get pop-up that forge installed correctly, but when i check proper folder in versions folder there is only .json file. Tried also using forge 10.13.4.1448 and i have same problem, but 10.13.2.1291 which i download long time ago works perfectly.
10.13.4.1491 installer log
1.7.10-Forge10.13.4.1492-1.7.10.json file content