Thank you for confirming that you are able to replicate this issue, Thomas.
Thank you also for the additional information about the log file and crash report. I reviewed the crash reports in my system and found that there seems to be 2 different issues: using the fulltext parameter results in the same error you see in 2.1.0p8; while using no parameters results in TypeError (Object of type HTML is not JSON serializable).
Can you please confirm whether you are also able to reproduce the latter case? If not then it has likely already been fixed.
I can confirm that using the name parameter works properly on vanilla 2.1.0 as well.