GMOD Publishing Utility Issue NEED HELP

so im trying to upload a custom map bsp to workshop with GMOD Publishing Utility.
i have done everything and went to execute and it gave me this error

Creating temporary addon.json.
[SEVERE] Creation Errored!
[SEVERE] null
C:\Users\Street\Desktop\map\rp_downtown_v4c_v2c.bsp\addon.json (The system cannot find the path specified)

You must follow addon structure.

what am i doing wrong?

Addon FOLDER structure.