Yep, I will try to update later.
Ok, I think I fixed it.
First, I disabled all plugins by FTP access by renaming the plugins folder and then login into the site. I could login but my site was a mess without plugins.
When I rename again the “plugins” folder to original name, the site stills showing me the same error.
So, I saw the Jetpack plugin was disabled, like all plugins I installed.
At least I could install Jetpack plugin and connect it to my site to restore it by backup.
Then I install again my wp version I had before the update using ftp, without copying the wp-contents folder to avoid a new failure and maintain my plugins setup.
And, for now, It looks great. I have to check it.
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This reply was modified 9 years ago by europeanlc.