If you are providing workers with custom instructions, you may receive this error when CloudResearch has trouble converting your text to MTurk.
When you enter custom instructions for workers, CloudResearch must convert the format of the text for it to be displayed properly to workers on Mechanical Turk. Converting this information requires not only the conversion step but also a "relay" step where CloudResearch passes the information to MTurk via application programming interface (API). The error message above appears when there is a mistake in the conversion or relay process. Simply put, it's a code error.
To solve this error, you can change a single character in your instructions (e.g., create a space or delete a space) and then try saving the instructions again. Changing a character before re-saving often allows the system to recompute, send the message again, and usually solves the error.
If the problem persists, please contact support@cloudresearch.com and include your Survey ID in your message.