alain-jacomet

OK. The solution to this was deactivating all of the plugins, renaming the plugins folder to something else.

Then, with all of them deactivated, access was granted.

Activating one by one revealed that WP-DB-Backup was causing the problem.
I haven’t found out why.

It is.

/wp-content/languages/
..
es_ES.mo 276.271 -rw-r–r–
es_ES.php 66 -rw-r–r–
es_ES.po 441.784 -rw-r–r

The solution is downloading the ‘User Photos’ plug-in, which makes it automatically possible.