White Screen of Death. Everytime.

But does the plugin install correctly?During install not much is performed other than creating db tables
What do you see in the error logs?

No it does not install. It seems like it’s going to and then goes to the white screen of death. Every time.

I had my hosting support look at it and here is what they said:

“The issue is with the plugin itself. It is an outdated plugin which is calling arguments which have been deprecated in newer versions of wordpress. Contact the developer of the plugin to report the bug and/or see if there is a newer version you may use. See error message below:

Notice: has_cap was called with an argument that is deprecated since version 2.0! Usage of user levels by plugins and themes is deprecated. Use roles and capabilities instead. in /usr/www/virtual/xxxxx/www.xxxxxxxxxx.com/wp-includes/functions.php on line 3318 Fatal error: Call to a member function render() on a non-object in /usr/www/virtual/xxxxx/www.xxxxxxxxx.com/wp-content/plugins/all-in-one-event-calendar/vendor/twig/Environment.php on line 300″

I downloaded the plug in from the WordPress repository and got 2.1.5
I downloaded it from the website and got 2.1.4

What I keep trying to get working is 2.1.5 which I’ve installed manually, and via the “add plug in” function in the dashboard.

Hi, the has_cap it’s just a Notice. We will have to change it but it’sa minor and it’s not the cause of the crash. The cause of the crash is the compilation of twig templates.
Do you see a folder called ai1ec_static somewhere in wp-content?When trying to reinstall, can you delete all options from wp_options that start with ai1ec?something like DELETE from wp_options WHERE option_name like 'ai1ec%'; and delete content of ai1ec_static.

Also do you have other addons enabled done by us?Like extendev views or something like that

I didn’t specify it, try to use 2.1.5. How can you download 2.1.4?

I downloaded 2.1.4 from here: https://time.ly/wordpress-calendar-plugin/ . That is the download that is given. However I have been using 2.1.5.

No, there is no folder called a1ec_static in wp-content.
I have no add ons installed.

When trying to reinstall, can you delete all options from wp_options that start with ai1ec?something like DELETE from wp_options WHERE option_name like ‘ai1ec%’; and delete content of ai1ec_static.

I have no idea what this means or where to find wp_options. Can you be a little more clear on where this is?

Hi

DELETE from wp_options WHERE option_name like 'ai1ec%';

is a query to run on the database that cleans our options. It assumes your wordpress install uses the prefix wp_ for tables. IF you don’t know how to access your db you should ask your hosting to run it after making a backup of the database

Then try to reinstall. Before installing make sure that you have no folder called “all-in-one-event-calendar” in the plugin folder and no folder called “ai1ec_static” in wp-content

Ah! Database.
OK, I can do that.
Thank you, I’ll give it a try.

And please, try to download again the plugin and to clean previous version from the filesystem. I really do not know what’s happening but it’s strange.

OK,

?Deleted Plug in
?Ran Queery
?Checked server, no instance of plug in or any remnants. No instance of “ai1ec_static” anywhere in wp-content or anywhere else.
?Installed fresh copy of All In One Event Calendar 2.1.5 Plug in from the dashboard direct from the WordPress Repository. Installation took forever. At least 3 minutes.
?Activated Plug In
?White screen of death.

FYI, I’ve also activated a default WordPress theme and deactivated all plug ins, and did a fresh install of the plug in and still get the same result.

can you install other plugins?Because i did the same as you did and it took me 10 seconds to install our plugin from the wordpress repo

also did you try to download from wordpress and copy through ftp?

I’ve tried it every possible way and multiple, multiple times.

Yes, I can install other plug ins just fine.

Incidentally, I do have it installed on another site and it works just fine. That’s why I keep at it because I know it works. But it is just not working on this site no matter what I do.

Unfortunately i can’t help you much.
My best guess is this: to render html we use a templating engine called Twig.
It seems that activation is triggered without errors ( i say this because WordPress check for fatal errors during activation and if a fatal error happens activation is prevented ) and then when we try to render a notice it triggers a fatal error:

Fatal error: Call to a member function render() on a non-object in /usr/www/virtual/xxxxx/www.xxxxxxxxx.com/wp-content/plugins/all-in-one-event-calendar/vendor/twig/Environment.php on line 300

This could be an unserialized object, do you happen to have caching activated?Like a plugin or your web host ( wp-engine for example has caching built in ).

Yes, I have a cache plug in installed. I’ve deactivated it.

The other site where it does work, has the same cache plug in installed and activated, and the installation went just fine.

I’m completely stumped.

Can you clean object cache?Purge everything?
Even maybe completely uninstall the cache plugin?
You could reinstall it after our plugin. This really sounds like a cache issue, i mean something is not unserialized correctly and then used as a object