The issue is with the translation.
index.php line 179:
“><?php _e(‘Read More’, ‘evolve’); ?>
Translation is missing for ‘Read More’ (uppercase “M”) in the de_DE.po file.
A translation exist for ‘Read more’ (lowercase “m”) in the de_DE.po file.
Since I am not familiar with loco translate, I fixed this by changing ‘Read More’ to ‘Read more’ (lowercase “m”) in the index.php file. I would prefer that this gets corected in the theme itself in the future so that I don’t have to edit the index.php file myself, which is not the right thing to do.