A few things to note that might be causing the issue. First, make sure you have a blank __resource.lua file (unless meta files have been specified) and that you also have a stream folder in the directory next to the __resource.lua file. Make sure each dictionary/mapping files for your vehicles don’t exceed 16 Mb in size, as they are known to cause issue.
Make sure you are starting the resource properly via the correct prefix (which is start resourcename).
If these don’t work, please post a screenshot of your stream folder.