SWISH Programs stop working after login

SWI-Prolog web site and services
1

Hi, I want to learn prolog on https://swish.swi-prolog.org/ but as soon as I login nearly all programs stop working and result in an error message. They work again, as soon as I log out. What am I missing? Many thanks, Carsten

2

Doesn’t ring a bell. What error? Can you provide a link to the specific program?

3

{"code":500, "message":"Arguments are not sufficiently instantiated"}
e.g. in the following example (in chrome).
The screenshot shows before and after login of the same code

swish
swish1912×1057 255 KB

4

Thanks. The detail is that you must login with Stackoverflow. With Google all works fine. I’ll see what is wrong.

5

Thanks, yes I logged in via stackoverflow. Works fine with google login.

6

Now works again with Stackoverflow. Thanks for reporting.