Extensions page is blank in the Internet Explorer 11 in Plesk Obsidian. Chrome and Firefox shows the page correctly.
Browser console shows the error:
CONFIG_TEXT: SCRIPT5002: Function expected
File: main.js, Line: 1, Column: 33544
This is a Plesk bug with ID #PPP-45309 which is planned to be fixed in one of the future product updates.
Until the fix becomes available use on of the following workarounds: