plugins stuck after changing wp-config file

I’m trying to create a multi-website so I modified the wp-config.php file. To set up the network, I had to deactivate the plugins. I saw that my plugins were not updated, so I updated some of them first. The first couple updated fine, but the next couple got stuck with an error of server busy. Then I tried deactivating a plugin, and it timed out. Now I can’t even get into the admin area. What to do?

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