The online compiler seems to be giving an error, see below. As far as I can tell wandbox.org is operational.
ReferenceError: twttr is not defined at https://wandbox.org/build/_shared/chunk-HWTQ5KW5.js:104:29713 at Gf (https://wandbox.org/build/_shared/chunk-2LKANNDY.js:9:6560) at L.unstable_runWithPriority (https://wandbox.org/build/_shared/chunk-2LKANNDY.js:1:4026) at rn (https://wandbox.org/build/_shared/chunk-2LKANNDY.js:5:38448) at Xe (https://wandbox.org/build/_shared/chunk-2LKANNDY.js:9:6029) at yi (https://wandbox.org/build/_shared/chunk-2LKANNDY.js:7:10750) at https://wandbox.org/build/_shared/chunk-2LKANNDY.js:5:38670 at L.unstable_runWithPriority (https://wandbox.org/build/_shared/chunk-2LKANNDY.js:1:4026) at rn (https://wandbox.org/build/_shared/chunk-2LKANNDY.js:5:38448) at Cs (https://wandbox.org/build/_shared/chunk-2LKANNDY.js:5:38616)
The online compiler seems to be giving an error, see below. As far as I can tell wandbox.org is operational.
ReferenceError: twttr is not defined at https://wandbox.org/build/_shared/chunk-HWTQ5KW5.js:104:29713 at Gf (https://wandbox.org/build/_shared/chunk-2LKANNDY.js:9:6560) at L.unstable_runWithPriority (https://wandbox.org/build/_shared/chunk-2LKANNDY.js:1:4026) at rn (https://wandbox.org/build/_shared/chunk-2LKANNDY.js:5:38448) at Xe (https://wandbox.org/build/_shared/chunk-2LKANNDY.js:9:6029) at yi (https://wandbox.org/build/_shared/chunk-2LKANNDY.js:7:10750) at https://wandbox.org/build/_shared/chunk-2LKANNDY.js:5:38670 at L.unstable_runWithPriority (https://wandbox.org/build/_shared/chunk-2LKANNDY.js:1:4026) at rn (https://wandbox.org/build/_shared/chunk-2LKANNDY.js:5:38448) at Cs (https://wandbox.org/build/_shared/chunk-2LKANNDY.js:5:38616)