Updates are impossible : error HTTP500

Hello,

Since several weeks I am not able to update any of my plugins.
I have 15 updates to do, but when I try to do even just one, whether it be a plugin, theme update, or WordPress update, I get an HTTP 500 error message, or internal server error.
https://bibleostervald.org/wp-content/uploads/2017/07/Internal-server-error-when-I-update-a-plugin-1.jpg

My website: bibleostervald.org

Do you know what this could be due to and how to proceed to fix this ?

Any help would be very much appreciated.

• This topic was modified 8 years, 10 months ago by Johanna.