Agent assign "SSL peer certificate or SSH remote key was not OK"

Hi

i am trying to install the Teamviewer-iot-agent on a custom device.

When i try to assign the key with the command:

teamviewer-iot-agent assign -t xxxxxx-xxxxxxxxxxxxxxxxxx -g $'My computers'

i receive

Assignment is in progress ...

Failed to assign. See the log file for details.

and the log shows

HttpClient::CreateRequest options=<none>

2021/04/24 23:45:36.074 25634 3069874192     HttpRequest::StartGet url=https://webapi.teamviewer.com/api/v1/devices?remotecontrol_id=r2029763294

2021/04/24 23:45:36.216 25634 3067101008 !! HttpRequestImpl::CurlFinished(): curl request failed: SSL peer certificate or SSH remote key was not OK (60), SSL certificate problem: unable to get local issuer certificate

2021/04/24 23:45:36.218 25634 3069874192  !! DeviceAssignmentStarter::Run: device assignment failed - WebAPI failed to perform requested action - HTTP request has failed permanently - https://webapi.teamviewer.com/api/v1/devices - SSL certificate problem: unable to get local issuer certificate, Errorcode=97

any help?