Calendar upgrade fails, attempts to downgrade also fail

You might need to Install WordPress 4.1, Since the new version is compatible with WordPress 4.1.
To upgrade or downgrade a Plugin, Just Uninstall/delete the whole Plugin “All-in-one-event-calendar” and Install another one of your choice.

can you do the following?

2) force debug mode just for one or two requests. To do so add

define( ‘AI1EC_DEBUG’, true );

on line 12 ( or on line 13 if you used point 1 ) and then refresh the calendar page once or twice. this refreshes all caches ( TWIG, CSS and so on ) and has a BIG performance hit. So after 1 or 2 refreshes you must delete this.

Going back to 1.X version is not possible once you have upgraded to 2.x

The problem appears to be file & directory permissions.

There seems to be something odd with the cPanel setup, and unless I change the entire installation to be world writable, I can’t do basic WP functions like plugin updates, I can only do everything manually via FTP.

This hasn’t been a problem, but apparently AIE1C wants to write to everything all the time, and it complains and complains and complains and fails and will never even save settings without wanting me to enter FTP info which doesn’t always work (wth, settings should be saved in the db, and you don’t need FTP info to do that).

At this point I’m not even sure if I can wipe the calendar setup entirely and reinstall version 1 fresh, see if it is less needy, or it looks like I’m going to have to find a new calendar solution, or just get rid of the calendar from this site entirely.

We need to write files as we have twig templates and custom css. You can skip file caching by setting

if ( ! defined( 'AI1EC_DISABLE_FILE_CACHE' ) ) {
	define( 'AI1EC_DISABLE_FILE_CACHE', false );
}

in all-in-one-events-calendar.php

That seems to have stopped the errors about 80% of the time, but that twig fatal error pops up now and again, the FTP connection window always pops up when I’m trying to edit settings, and now with Posterboard view enabled, the site gets stuck trying to connect to Facebook, and the site takes about 100% longer to load.

I’m going to have to find another solution. Shame, this used to be a nice fast, easy to use plugin.

This error

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

means out of date templates. There are old templates and they get
Try to delete all templates in folder cache ( under plugin root ) and ai1ec_static ( under wp-content ). Can you please tell me if you have ai1ec_static?
If you do not have cached templates, of course they need to be recompiled on every request and this can hurt performance

Since I’m on a server with double the resources of my previous server, and the calendar seems to have been the primary source of slow site loads, even when the caching was on, this is a problem of having something pretty for a small segment of our visitors to look at vs sitewide functionality and performance.

We got a little over 2 years of fun out of using the calendar, but it’s not worth it anymore, seeing that it adds over 5 seconds to the load time (this was with the caching on previously), and doesn’t work as efficiently as before. It’s entirely possible that the problem is the Facebook connecting, since when I disable the calendar, all the hung connections to Facebook go away, but it’s a moot point now.

Thanks, but we won’t be using this plugin anymore, and likely won’t implement a calendar using this plugin on a new site we’re working on.

No worry, i’m not trying to convince you ??
I was just trying to understand why it’s slower for you, as 2.0 is much lighter in resources than in 1.x, so it must be something different. I mean, it could be of help to other users.
I’ll try to see if the Facebook add on slow things down

Can’t say for sure, but it didn’t seem like 2.0 was lighter in resources (I had an earlier version of 2 working on a development version of the site before we moved servers). The attempts to connect with Facebook were the biggest drag, according to 3 different page speed testers i’d tried.

I would also see it get slow when it was rearranging posterboard items (almost like a stutter)… it didn’t happen all the time, but I could never figure out how to turn that off, because it would always try to rearrange things by image size, sliding events out of chronological order, which sort of defeated the purpose of it being in calendar order ??

If a lot of our visitors complain about it being gone, I’ll look for a solution, but for now, I don’t have any calendar for convention events.

Thanks again