Hi A,
please try to update your Simplifier instance to the latest quality update available for the release build you are currently using (either release 8 or release 8 EHP 1). You can find the latest changes and build numbers in our changelog here in the community. Also, you should make sure that your user has the necessary Workflow-related permissions assigned to them. All relevant permissions are listed and explained in greater detail on our respective documentation page. Additionally, please check whether the workflow-designtime docker container is properly running in your hosting environment as a prerequisite for using the Workflow function in Simplifier.
Should the error persist even after taking all the above-mentioned steps into consideration, please create a ticket in our decicated support portal or ask the person responsible for Simplifier in your organisation to do so in your name. This is in accordance with our standard support process for Simplifier-related issues.
Thank you in advance and kind regards,
Armin