Please help us help you and fill where relevant:
LimeSurvey version: 7.1.14 -> 7.1.15
Own server or LimeSurvey Cloud: Own server (Hosted)
Survey theme/template:
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Hello,Now, I upgraded our LimeSurvey from 7.1.14 to 7.1.15.

ComfortUpdate completed successfully, including the "Pre-installation check".(Like 1st screenshot)
However, when I logged in afterward, the database upgrade screen appeared, followed immediately by an error stating that the minimum system requirements were not met.(Sorry, I didn't get screenshot on this time)
Admittedly, I had been using MySQL 5.7 and knew an update was overdue, but this caught me completely off guard!Out of necessity, I urgently upgraded to MariaDB 10.3.

Despite this, the same screen threw an error stating: "MariaDB 10.3.38 or newer is required, but the server reports version 10.3.7.", preventing me from moving forward.(2nd screenshot)
Since our server is on a hosted environment, upgrading MariaDB any further is not feasible.

As a result, I had to revert the application files back to version 7.1.14 while maintaining the switch to MariaDB.Raising the database requirements so drastically without any prior warning causes major issues for us!