@Pratyush Sharma I thought issue was pretty clear and well understood but I'll explain it in as much detail as I can. Also I must agree with other posters in this thread, I am using various cpanel products almost every day and logging in to those is a big reason for needing a password manager with auto filling browser extension in the first place so one must indeed explore other options if no updates will be made soon.
A server with cpanel installed has (at least) two management web gui's, one is accessible on exampledomain.tld/cpanel or exampledomain.tld:2083 and that is the customer facing one commonly known as Cpanel. The other one known as WHM or Web Host Manager gives access to more low level stuff in the server config as well as managing customer and reseller access to the customer portal and is accessible on exampledomain.tld/whm or exampledomain.tld:2087
The issue for both of these is the same, when I press my shortcut for the browser extension I get the window and it shows the correct entry, but when I double click on it to auto fill nothing happens. Also I have checked and nothing gets printed to JS Console error log or anything else I can find.
This leaves the only working way for me to bring up the browser extension, clicking the info icon and then manually copying the password from enpass to paste it in the login window.
Again, if you want to try this out your self there are demo's of cpanel available online that behave in the exact same way, that is you can try creating a dummy entry for them in enpass and auto filling on these url's and it will not work, just like on my own servers as well as on cpanel servers hosted by others that I have had access to.
Cpanel online demo login: https://demo.cpanel.net:2083/
WHM online demo login: https://trycpanel.net/logout.html
Best regards and hope you can fix this soon, Haddi