2 Dec 07, 2019 10:27
You don't explain the steps you took to upgrade. Was it via your host or via your Site > System > Auto Upgrade.
Rather than give a spiel on this # I gather you didn't do a search of posts before you asked for help :(
a) In a healthy host probably a minute
b) Read other posts by me and others ~ start with this one maybe
c) Read about the .maintenance.php file removal and see if that works.
I had this problem on a previous host as certain swould time out so I now manualy upgrade via filezilla even though I have a new host. I have upgraded from 6.11.3 to 6.11.4 a few days ago but didn't try the auto ~ a pity as it may have been fine on my new host.
Most people don't have a problem.
EDIT :: UPDATE
I have just used Site > Settings > Auto Upgrade on another of my sites and as mentioned above it took about a minute.
So if after reading other posts that reiterate your problem you may like to overwrite your install manually using Filezilla or the like.
Hopefully you have a copy of your previous version you can use to overwrite if you want.
Would also be usefull if you supply other info requested such as Host | php verison etc
By the way http://www.pixievacationsbymonica.com/blog/admin.php is not a host name :)