CORS policy access for google cloud voices

In my application, whenever I call sayText with one of the traditional voices all works fine. Now, I have a platinum plan and I linked my google cloud api key. All voices work when I test them inside SitePal. However, when I try to call those voices from sayText in localhost:5000, I get the following chain of errors:

sitepal:1 Access to XMLHttpRequest at 'http://cache-a.oddcast.com/tts/genC.php?EID=91&LID=2&VID=11&TXT=Hello%20Alice%2C%20it%27s%20great%20to%20have%20you%20here.&EXT=mp3&FNAME=&ACC=8688641&SceneID=2756818&HTTP_ERR=' from origin 'http://localhost:5000' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.

VHSSEngine_R.js:24 GET http://cache-a.oddcast.com/tts/genC.php?EID=91&LID=2&VID=11&TXT=Hello%20Alice%2C%20it%27s%20great%20to%20have%20you%20here.&EXT=mp3&FNAME=&ACC=8688641&SceneID=2756818&HTTP_ERR= net::ERR_FAILED 503 (The server is temporarily unable to fulfill the request. OK to re-resubmit.)
load @ VHSSEngine_R.js:24
cf @ VHSSEngine_R.js:28
Aa @ VHSSEngine_R.js:28
FU @ VHSSEngine_R.js:2
cN @ VHSSEngine_R.js:2
sayUrlWithID3 @ VHSSEngine_R.js:7
sayUrl @ VHSSEngine_R.js:7
_playAudio @ sitepalPlayer_v1.js:1
playAudio @ sitepalPlayer_v1.js:1
(anonymous) @ sitepalPlayer_v1.js:1
setInterval
vhsshtml5_callAudiotoPlay @ sitepalPlayer_v1.js:1
handleProcessAudioRequestsCall @ sitepalPlayer_v1.js:1
vhssHTML_handleProcessAudioRequests @ sitepalPlayer_v1.js:1
sayText @ sitepalPlayer_v1.js:1
chatResponse @ sitepal.js:717
(anonymous) @ sitepal.js:656
Promise.then
startSystem @ sitepal.js:644
vh_sceneLoaded @ sitepal.js:743
vhssHTML5_loadedCallback @ sitepalPlayer_v1.js:1
(anonymous) @ sitepalPlayer_v1.js:1
(anonymous) @ sitepalPlayer_v1.js:1
Promise.then
checkUserInteraction @ sitepalPlayer_v1.js:1
characterFullyLoaded @ sitepalPlayer_v1.js:1
(anonymous) @ VM817 VHSSEngine_R.js:7
(anonymous) @ VM817 VHSSEngine_R.js:8
(anonymous) @ VM817 VHSSEngine_R.js:14
eH @ VM817 VHSSEngine_R.js:20
(anonymous) @ VM817 VHSSEngine_R.js:14
F9.req.onload @ VM817 VHSSEngine_R.js:7
XMLHttpRequest.send
F9 @ VM817 VHSSEngine_R.js:7
(anonymous) @ VM817 VHSSEngine_R.js:14
(anonymous) @ VM817 VHSSEngine_R.js:7
L5.load.image.onload @ VM817 VHSSEngine_R.js:13

sitepal:1 Access to XMLHttpRequest at 'http://cache-a.oddcast.com/tts/genC.php?EID=91&LID=2&VID=11&TXT=I%20understand%20you%20might%20be%20concerned%20due%20to%20the%20recent%20discovery%20of%20BRCA1%20gene%20mutation.%20In%20order%20to%20guide%20you%20appropriately%2C%20can%20you%20share%20with%20me%20whether%20you%20have%20had%20any%20breast%20screening%20tests%20such%20as%20a%...' from origin 'http://localhost:5000' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.

VHSSEngine_R.js:24 GET http://cache-a.oddcast.com/tts/genC.php?EID=91&LID=2&VID=11&TXT=I%20understand%20you%20might%20be%20concerned%20due%20to%20the%20recent%20discovery%20of%20BRCA1%20gene%20mutation.%20In%20order%20to%20guide%20you%20appropriately%2C%20can%20you%20share%20with%20me%20whether%20you%20have%20had%20any%20breast%20screening%20tests%20such%20as%20a%... net::ERR_FAILED 503 (The server is temporarily unable to fulfill the request. OK to re-resubmit.)