[BUG] Unable to connect Office 365 with Plesk Domain Connect extension: app is undefined

Symptoms

Unable to connect Office 365 with Plesk Domain Connect extension, the process ends up in the Domain Connect extension with a blank empty page when checking DPOO (Domain Proof Of Ownership) and the browser console (F12) shows the following errors:

CONFIG_TEXT: Uncaught TypeError: app is undefined
<anonymous> https://plesk.example.com/modules/domain-connect/domain-connect-apply.js:84
<anonymous> https://plesk.example.com/modules/domain-connect/domain-connect-apply.js:144
domain-connect-apply.js:84:5

CONFIG_TEXT: Uncaught TypeError: Cannot read property "renderTo" of undefined

Cause

The file domain-connect-apply.js is loaded before the necessary Javascript variable PleskExt.DomainConnect is loaded.

This is Plesk Domain Connect extension bug ID #EXTPLESK-2602 which is going to be fixed in future Plesk updates.

Resolution

As a workaround:

1. Connect to the server via SSH

2. Run the following command:

   # sed -i.backup-`date +%F-%s` 's/<script>/<script defer>/g; s/<script src/<script defer src/g' /usr/local/psa/admin/plib/modules/domain-connect/views/scripts/v2/apply.phtml