troubles activating and deactivating/deleting plugins

Resolved Achim Hahn
(@achimhahn)

1 year, 11 months ago
Hello,
which plugins are known to cause trouble with activating and deactivating/deleting other plugins?

If I want to activate an installed plugin, it says “plugin activated” but after page refresh it isn’t.
If I want to deactivate an installed plugin, it says “plugin deactivated” but after page refresh it isn’t.
If I deactivate an installed plugin (message “plugin deactivated”) and click “uninstall” without page refresh it says “You can’t uninstall a plugin, that is still active on the main page.”

I have no evidence but I think this is the consequence of installing security plugins.

Do you have an idea how to fix this?

Thanks a lot
Achim
- This topic was modified 1 year, 11 months ago by Achim Hahn.
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Viewing 9 replies - 16 through 24 (of 24 total)

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Thread Starter Achim Hahn
(@achimhahn)

1 year, 10 months ago
In wp-content there are
the subdirectories
cache, languages, plugins, shield (from the plugin shield security), themes, updraft, upgrade, uploads, w3tc-config and
the files
advanced-cache.php, db.php, index.php, object-cache.php and debug.log.

In wp-content/plugins there are
the subdirectories of all activated plugins and the index.php.

If this is what you meant … 🙂
- This reply was modified 1 year, 10 months ago by Achim Hahn.
Moderator Steven Stern (sterndata)
(@sterndata)

Volunteer Forum Moderator

1 year, 10 months ago

So I’d try posting a message to the devs of each of those security plugins to see if their plugin can block plugin deactivations.

Thread Starter Achim Hahn
(@achimhahn)

1 year, 10 months ago

Okay, I have allready started with a post in shield security’s support forum.

Thank you very much for your support, Steve!
Also thanks to you, Ramona!

Paul
(@paultgoodchild)

1 year, 10 months ago

@achimhahn This behaviour you’ve described in \wp-content\shield\ptguard\plugins is perfectly normal for Shield. It’s part of Shield’s processing and would in no way cause the behaviour you’re outlining here.
Thread Starter Achim Hahn
(@achimhahn)

1 year, 10 months ago
@sterndata @nextend_ramona

Strike! I found out what caused the problem!

It was the plugin Query Monitor.

As I tried to activate an installed plugin (health check) and clicked on the option “health check” I got an error message, saying that I dont’t have the right to enter that page.
I add the message here, but it is in German:
```
Du bist leider nicht berechtigt, auf diese Seite zuzugreifen.
Diese Meldung wurde durch WordPress Core ausgelöst.
Aufrufstapel
    wp_die()
    wp-admin/includes/menu.php:364
Query Monitor
```
“Sender” was the plugin Query Monitor.

So I forcefully deactivated it (by renaming the plugin subdirectory) and … everything was fine again. I’m able again to activate/deactivate/delete plugins as usual.

I have not tested, wether it was due to settings of QM or to the plugin itself!
Moderator Steven Stern (sterndata)
(@sterndata)

Volunteer Forum Moderator

1 year, 10 months ago

Utterly bizarre! Anyhow, good detective work! I recommend reporting this at https://wordpress.org/support/plugin/query-monitor/#new-post so the plugin’s developers and support community can help you with this.

Thread Starter Achim Hahn
(@achimhahn)

1 year, 10 months ago

@sterndata

I posted it in the QM support forum.
Thanks and bye!

Thread Starter Achim Hahn
(@achimhahn)

1 year, 10 months ago

@sterndata @nextend_ramona

It was an issue of clearing the object cache.
That solved the problem.

Ramona
(@nextend_ramona)

1 year, 10 months ago

I’m glad it’s sorted!