idk what to do :c
Check server configuration
Warning: Error parsing C:/Users/Arek Mańka/Desktop/OTS/TFSEngine 8.6 by ownOTS/config.lua on line 30 in D:\xampp\htdocs\install.php on line 154
File config.lua loaded from C:/Users/Arek Mańka/Desktop/OTS/TFSEngine 8.6 by ownOTS/config.lua and it's not valid TFS config.lua file. Go to STEP 1 - select other directory. If it's your config.lua file from TFS contact with acc. maker author.