I really hesitate to help you with such messages...
So I'll let you search, but here is what you should look at :
QuoteThe following packages have unmet dependencies:
mariadb-client-10.2 : Depends: mariadb-client-core-10.2 (>= 10.2.36+maria~stretch) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.\Zn
Hi,
First of all : Reporting rules - Reminder
Secondly : Post in the good section of the forum next time 
i-MSCP Services is for services regarding the site/bug tracker, etc
Then, you screen is "pointless", we even don't have the full system message (35% of the screen is displayed).
From this screen, there is "no errors", but I'll make a guess, you might have some broken packages, so check your system in regard to that (=> apt stuff, you should know about it on how to use it).
The bug tracker is offline, but just in case you see this Nuxwin , this issue is back with latest LetsEncrypt 3.6.0
I do not remember the solution you did apply, as this was fixed, but this is the exact same issue.
If I disable the Let's Encrypt plugin, this is working, failed again after re-activated.
Well, that's always the same workaround as I said there : PhpSwitcher: add APCU, Imagick and IONCUBE
It's already set to use PHP7.1, funny so.
One day I'll take a better look at it, thanks.
The content of /var/lib/nginx/fastcgi is empty, and I already restart the imscp_panel service (if not done, can't access any PMA page).
That's really odd, really sounds like a cache issue, but don't know where it lies (but as far as PMA 4.9.x is updated, it's fine... for now)
Speddy I see you did upgrade to the PhpMyAdmin 5.x series.
When I did it on two servers, it's working, but there is "a sneaky bug" with me.
Can you go when logged (admin or user), on any database (left menu), inside the "new table" link (in your screen page 3, would be the "Neu" link, the URL you should get is of this form : "https://YourPanel.tld/pma/tbl_create.php?server=X&db=DBName") ?
When I click on it, infinite loading, nothing came to me (just the URL change, if I refresh, get a long error).
So far, I'm stuck with release 4.9.x 
No support will be provided to outdated system (update your i-MSCP panel).
Firstly : You want some kind of support ? Well, wrong location for this post, should be under "support" section
Secondly : You still want some kind of support ? Well you should follow the reporting rules written there : Reporting rules - Reminder
Third and last for now : "flames" asked you THE SERVER'S LOGS about the error, why you stick with the browser reports which are useless there ?...
So now, comply with the rules or thread will be closed... (you are not new here, you should be aware of those rules)
