I am trying to implement Twilio Flex for Salesforce Open CTI. I am using a twilio trial account. Twilio Inbound calls to salesforce using twilio flex is fine. But Click-To-Dial for salesforce outbound call using twilio flex is not working. When I click a phone number from the salesforce contact page, the twilio window pops up and shows a message 'Attempting Outbound call now' then stops and no call is placed in the specified number.

And I got this console error erery time

Refused to run the JavaScript URL because it violates the following Content Security Policy 
directive: "script-src 'self' 'nonce-fbd8b58ceca1755f12efd1a1e2bd2a8f' 
chrome-extension: 'unsafe-eval' *.canary.lwc.dev *.visualforce.com 
https://ssl.gstatic.com/accessibility/ https://static.lightning.force.com". 
Either the 'unsafe-inline' keyword, a hash ('sha256-...'), or a nonce 
('nonce-...') is required to enable inline execution.

Error: outbound calling disabled
    at assets.flex.twilio.com/releases/flex-ui/1.23.1/twilio-flex.min.js:1461
    at assets.flex.twilio.com/releases/flex-ui/1.23.1/twilio-flex.min.js:1461
    at Object.next (assets.flex.twilio.com/releases/flex-ui/1.23.1/twilio-flex.min.js:1461)
    at assets.flex.twilio.com/releases/flex-ui/1.23.1/twilio-flex.min.js:1461
    at new Promise (<anonymous>)
    at i (assets.flex.twilio.com/releases/flex-ui/1.23.1/twilio-flex.min.js:1461)
    at e.startOutboundCall (assets.flex.twilio.com/releases/flex-ui/1.23.1/twilio-flex.min.js:1461)
    at e.<anonymous> (assets.flex.twilio.com/releases/flex-ui/1.23.1/twilio-flex.min.js:142)
    at assets.flex.twilio.com/releases/flex-ui/1.23.1/twilio-flex.min.js:142
    at Object.next (assets.flex.twilio.com/releases/flex-ui/1.23.1/twilio-flex.min.js:142)
(anonymous) @ assets.flex.twilio.com/twilio/flex-salesforce-integration/1.4.0/plugin-flex-salesforce-integration.js:1