I followed the DAML tutorial, and it seems that there is a bug:
https://docs.daml.com/getting-started/quickstart.html#try-out-the-application
Try creating a contract from a template. Issue an Iou to yourself by clicking on the Iou:Iou row, filling it out as shown below and clicking Submit. http://localhost:4000/templates/Iou:Iou@f7592b50015725110188fe00bea8373fdcdceaeea90a1664682df422a9853b6e/
After filling out the form and clicking Submit, I get this error:
Error: Network error: Network request failed with status 500 - "Internal Server Error"