Wrike API error with Operation is not allowed due insufficient user rights or account license limitations

Hi,

I'm facing an issue using Wrike API when I try to create a Project.

I'm using permanent access token 

I can create a simple Folder easily with REST API but when I'm adding extra information for project part in order to create a Project folder, I'm receiving an error. 

So when I'm using a REST call to create a Project like : 

POST https://www.wrike.com/api/v4/folders/<FOLDER_ID>/folders

I receive :

HttpResponseException: 403 Forbidden

{"errorDescription":"Operation is not allowed due insufficient user rights or account license limitations","error":"not_allowed"}

I tried to use the Wrike Website directly and there, I'm able to create a Project in the target folder.

I checked other support threads, could it be related to the fact I'm using Permanent access token and not oauth2 token ? Do I need to be admin but in that case, why can I create a Project folder from Wrike website directly and not from REST API ?

Thanks a lot for your valuable support

Sebastien