Guess I cheered too soon.
Since I update my Matomo server to the latest beta, I can't access the marketplace.
Whenever I try to open
https://matomo.example/index.php?module=Marketplace&action=overview&idSite=7&period=month&date=today&activated=&mode=admin&type=&show=
I get An error occurred: Invalid MySQL Version

I am using MariaDB on Debian Stable (Stretch)

➜  ~/tools/certbot git:(master) mysql --version
mysql  Ver 15.1 Distrib 10.1.26-MariaDB, for debian-linux-gnu (x86_64) using readline 5.2

MariaDB [(none)]> SELECT @@version;
+--------------------------+
| @@version                |
+--------------------------+
| 10.1.26-MariaDB-0+deb9u1 |
+--------------------------+
1 row in set (0.00 sec)

I guess this has something to do with #12551 as I don't think something else has changed.

@diosmosis How did you test the version string detection?