NEO wallet balances not updating / swap from NEP5 to BEP20 not working

[Iruwen]

This also affects the swap NEP5 to BEP20 function which doesn't work because my balance doesn't update after undelegating my QLC.

This is what I see in the browser console:

Failed to load resource: the server responded with a status of 405 (Not Allowed)
core.js:6241 ERROR Error: Uncaught (in promise): Error Code: 405
Message: Http failure response for https://explorer.qlcchain.org/api/updates: 405 Not Allowed
    at resolvePromise (zone-evergreen.js:798:1)
    at zone-evergreen.js:705:1
    at rejected (tslib.es6.js:72:88)
    at ZoneDelegate.invoke (zone-evergreen.js:364:1)
    at Object.onInvoke (core.js:41708:1)
    at ZoneDelegate.invoke (zone-evergreen.js:363:1)
    at Zone.run (zone-evergreen.js:123:1)
    at zone-evergreen.js:857:1
    at ZoneDelegate.invokeTask (zone-evergreen.js:399:1)
    at Object.onInvokeTask (core.js:41686:1)
defaultErrorLogger @ core.js:6241
<address redacted>:1 Access to XMLHttpRequest at 'https://hub.qlcchain.online/info/swapInfosByAddress?address=<address redacted>&page=0&pageSize=20' from origin 'https://explorer.qlcchain.org' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource.
core.js:6241 ERROR Error: Uncaught (in promise): Error: Network Error
Error: Network Error
    at createError (createError.js:16:1)
    at XMLHttpRequest.handleError [as __zone_symbol__ON_PROPERTYerror] (xhr.js:84:1)
    at XMLHttpRequest.wrapFn (zone-evergreen.js:1218:1)
    at ZoneDelegate.invokeTask (zone-evergreen.js:399:1)
    at Object.onInvokeTask (core.js:41686:1)
    at ZoneDelegate.invokeTask (zone-evergreen.js:398:1)
    at Zone.runTask (zone-evergreen.js:167:1)
    at ZoneTask.invokeTask [as invoke] (zone-evergreen.js:480:1)
    at invokeTask (zone-evergreen.js:1621:1)
    at XMLHttpRequest.globalZoneAwareCallback (zone-evergreen.js:1647:1)
    at resolvePromise (zone-evergreen.js:798:1)
    at zone-evergreen.js:705:1
    at rejected (tslib.es6.js:72:88)
    at ZoneDelegate.invoke (zone-evergreen.js:364:1)
    at Object.onInvoke (core.js:41708:1)
    at ZoneDelegate.invoke (zone-evergreen.js:363:1)
    at Zone.run (zone-evergreen.js:123:1)
    at zone-evergreen.js:857:1
    at ZoneDelegate.invokeTask (zone-evergreen.js:399:1)
    at Object.onInvokeTask (core.js:41686:1)
defaultErrorLogger @ core.js:6241
hub.qlcchain.online/info/swapInfosByAddress?address=<address redacted>&page=0&pageSize=20:1          Failed to load resource: net::ERR_FAILED
<address redacted>:1 Access to XMLHttpRequest at 'https://hub.qlcchain.online/info/swapInfosByAddress?address=<address redacted>&page=0&pageSize=20' from origin 'https://explorer.qlcchain.org' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource.
core.js:6241 ERROR Error: Uncaught (in promise): Error: Network Error
Error: Network Error
    at createError (createError.js:16:1)
    at XMLHttpRequest.handleError [as __zone_symbol__ON_PROPERTYerror] (xhr.js:84:1)
    at XMLHttpRequest.wrapFn (zone-evergreen.js:1218:1)
    at ZoneDelegate.invokeTask (zone-evergreen.js:399:1)
    at Object.onInvokeTask (core.js:41686:1)
    at ZoneDelegate.invokeTask (zone-evergreen.js:398:1)
    at Zone.runTask (zone-evergreen.js:167:1)
    at ZoneTask.invokeTask [as invoke] (zone-evergreen.js:480:1)
    at invokeTask (zone-evergreen.js:1621:1)
    at XMLHttpRequest.globalZoneAwareCallback (zone-evergreen.js:1647:1)
    at resolvePromise (zone-evergreen.js:798:1)
    at zone-evergreen.js:705:1
    at rejected (tslib.es6.js:72:88)
    at ZoneDelegate.invoke (zone-evergreen.js:364:1)
    at Object.onInvoke (core.js:41708:1)
    at ZoneDelegate.invoke (zone-evergreen.js:363:1)
    at Zone.run (zone-evergreen.js:123:1)
    at zone-evergreen.js:857:1
    at ZoneDelegate.invokeTask (zone-evergreen.js:399:1)
    at Object.onInvokeTask (core.js:41686:1)
defaultErrorLogger @ core.js:6241