Has anyone seen this while executing dynamic REST HTTP request with createTransientHostFrom method - "Cannot execute the request: ; Auth scheme may not be null". Using basic auth/shared session. vRO 7.3.1 with REST plugin 2.2.2
EDIT: it seems to happen when executing a few REST calls simultaneously. I tried a few things - using createHostSupportingParallelRequests instead of createHost method, or using random suffix when creating dynamic host name. Neither seemed to help. The last resort was to use locking mechanism for now.
Could you check also with the latest tech preview build of the REST plug-in available at https://communities.vmware.com/docs/DOC-38659 ?
If the problem remains, could you prepare some code/workflows/etc. that can be used to reproduce the problem locally, and open a support request?