Espruino Wifi - How to reconnect?

Thanks for the fast answer @Gordon.
Unfortunately both solutions do not seem to work for me.

I get the following errors:

>Uncaught Error: Field or method "registerLine" does not already exist, and can't create it on undefined
 at line 1 col 13293
...ted',function(a){}),wifi.at.registerL­ine('WIFI DISCONNECT',f...

and

Uncaught Error: Function "a" not found!
 at line 1 col 165
...ce(15,-1);else if("OK"==d){a(null,b);return}return h}
                              ^
in function "b" called from line 1 col 25
d=void 0;var f;b&&(f=b(a))?(d=p,b=f):clearTimeout(e);­void 0=...
                        ^
in function "d" called from line 1 col 324
...c&&(e[c](k),n=!0);n||d&&d(k)}a=a.subs­tr(f+1);"\n"==a[0]&&(a=...
                              ^
in function called from system
Uncaught Error: Function "a" not found!
 at line 1 col 15
if(void 0===d)a("Timeout");else{if("+CIFSR:STAIP­"==d.substr(...
              ^
in function "b" called from line 1 col 15
d=void 0;b&&b()
              ^
in function called from system

respectively

Right now i use version 1v87, might that cause wifi.getIP() not to work?