Description of problem:
I've just installed a F26 system (net install).
at my first login, gnome-initial-setup appears, asking to complete some form.
after completing the 3rd page, I press "Next button" and gnome-shell crashes, bringing me back to GDM

Version-Release number of selected component (if applicable):
Fedora 26 up-to-date
gnome-shell-3.24.2-1.fc26.x86_64
gdm-3.24.2-1.fc26.x86_64
gnome-weather-3.24.0-1.fc26.noarch
gnome-initial-setup-3.24.2-1.fc26.x86_64

How reproducible:
100%

In journal I can see this error

mai 17 11:53:20 ivy systemd-coredump[8028]: Process 7592 (gnome-shell) of user 1000 dumped core.

Stack trace of thread 7592:
#0  0x00007f0f70af12f4 _gweather_location_update_weather_location (libgweather-3.so.6)
#1  0x00007f0f70ae5ec6 gweather_info_set_location_internal (libgweather-3.so.6)
#2  0x00007f0f70aea1ad gweather_info_set_location (libgweather-3.so.6)
#3  0x00007f0fa4681bde ffi_call_unix64 (libffi.so.6)
#4  0x00007f0fa468154f ffi_call (libffi.so.6)
#5  0x00007f0faed7a2ec n/a (libgjs.so.0)
#6  0x00007f0faed7ba96 n/a (libgjs.so.0)
#7  0x00007f0fa41a16a8 _ZN2js6InvokeEP9JSContextN2JS8CallArgsENS_14MaybeConstructE (libmozjs-38.so)
#8  0x00007f0fa41974cd _ZL9InterpretP9JSContextRN2js8RunStateE (libmozjs-38.so)
#9  0x00007f0fa41a1324 _ZN2js9RunScriptEP9JSContextRNS_8RunStateE (libmozjs-38.so)
#10 0x00007f0fa41a1614 _ZN2js6InvokeEP9JSContextN2JS8CallArgsENS_14MaybeConstructE (libmozjs-38.so)
#11 0x00007f0fa41a2243 _ZN2js6InvokeEP9JSContextRKN2JS5ValueES5_jPS4_NS2_13MutableHandleIS3_EE (libmozjs-38.so)
#12 0x00007f0fa43fabfb _ZN2js3jit14InvokeFunctionEP9JSContextN2JS6HandleIP8JSObjectEEjPNS3_5ValueES9_ (libmozjs-38.so)
#13 0x00007f0f90007134 n/a (n/a)