Ubuntu 19.10 Bluetooth – device added successfully, but failed to connect

My Bluetooth device connected to my headset once with Ubuntu 19.10, but since then, I get the message Device added successfully, but failed to connect $ lspci -knn | grep Net -A3; lsusb 02:00.0 Network controller [0280]: Qualcomm Atheros AR9462 Wireless Network Adapter [168c:0034] (rev 01) Subsystem: Lite-On Communications Inc AR9462 Wireless Network Adapter [11ad:6621]…

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Drupal8 Config Export

I want to export the configuration of drupal8 website. Which mean recently i enabled 4 core modules which are language related language,content translation,config translation,interface translation .I exported the core.extensions.yml file but when i placed the same file in dev environment then in dev those 4 modules in disabled state only. How can i enable these…

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i am try to call a method in solidity smart contract through angular app. but i unable to call the method. this is the error i get in console

i am try to call a method in solidity smart contract through angular app. but i unable to call the method. can someone please help me. this is the error i get in console TypeError: this.contract.methods.hello is not a function at CertificateContractService.<anonymous> (certificate-contract.service.ts:32) at Generator.next (<anonymous>) at fulfilled (tslib.es6.js:70) at ZoneDelegate.invoke (zone-evergreen.js:359) at Object.onInvoke (core.js:39699)…

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