Arduino DS3231 error: no matching function for call to 'DS3231::DS3231(const uint8_t&, const uint8_t&)'
Alright I found the problem.
https://www.youtube.com/watch?v=BM3A7w3bhqM&amp;ab_channel=MERTKILIC
In this video at 5:00 you can see the following:
First you have to download the library, unzip it and copy the files inside.
You will have to paste it to your Arduino/Libraries/DS3231 folder.

On the left is the current DS3231 Library which I added through the arduino library manager. Its not the same as the one the right, it should be, but its not, copy the files from the unzipped DS32321 library into the Arduino/library/DS3231.
Works fine now !