In the absence of the _GOPT_DEVICE input parameter, the STPBEGIN macro uses the JAVAIMG device driver on UNIX systems. It appears that Java is misconfigured on your system, and you can open a track with our Technical Support Department to get help fixing that:
https://support.sas.com/en/technical-support/submit-a-support-request.html
As a workaround, try specifying _GOPT_DEVICE=png as a URL parameter.
Vince DelGobbo
SAS R&D
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