richpav

I installed from the wp-admin plugin page. Searched for the plugin by name and clicked the install link on the wp-admin page. WordPress said it installed. I clicked the activate link on the wp-admin page. WordPress said it had an invalid header.

Next I went to the plugin page in wp-admin. I was able to activate it from there.

I had the same problem: I got an invalid error when trying to activate immediately after installing, but if I went to the plugin page I could activate there.

Here’s my rig:

### Begin System Info ###

	** WORDPRESS DATA **
Multisite:				No
SITE_URL:				https://localhost
HOME_URL:				https://localhost
WP Version:				3.8.1
Permalink:				/%category%/%postname%/
Cur Theme:				Firmasite-child
Post Types:				post, page, attachment, revision, nav_menu_item, forum, topic, reply, incsub_event, wpcf7_contact_form, groups, sfwd-courses, sfwd-lessons, sfwd-quiz, sfwd-topic, sfwd-certificates, sfwd-transactions
Post Stati:				publish, future, draft, pending, private, trash, auto-draft, inherit, closed, spam, orphan, hidden, recurrent
User Count:				4

	** WORDPRESS CONFIG **
WP_DEBUG:				Enabled
WP Memory Limit:			40MB
Show On Front:				posts
Page On Front:				Koga Eikaiwa (ID# 62)
Page For Posts:				Posts (ID# 2050)

	** BROWSER DATA **
Platform:				Apple
Browser Name:				Chrome
Browser Vers:				32.0.1700.107
UA String:				Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/32.0.1700.107 Safari/537.36

	** SERVER DATA **
jQuery Version				1.10.2
PHP Version:				5.5.3
MySQL Version:				5.5.33
Server Software:			Apache/2.2.25 (Unix) mod_ssl/2.2.25 OpenSSL/0.9.8y DAV/2 PHP/5.5.3

	** PHP CONFIGURATION **
Safe Mode:				No
Memory Limit:				256M
Upload Max:				32M
Post Max:				32M
Time Limit:				30
Max Input Vars:				1000
Display Errors:				Off
Sessions:				Enabled
Session Name:				PHPSESSID
Cookie Path:				/
Save Path:				/Applications/MAMP/tmp/php
Use Cookies:				On
Use Only Cookies:			On
FSOCKOPEN:				Your server supports fsockopen.
cURL:					Your server supports cURL.
SOAP Client:				Your server has the SOAP Client enabled.
SUHOSIN:				Your server does not have SUHOSIN installed.

	** PLUGIN INFORMATION **
Total Plugins:				33
Must-Use Plugins: (2)
	- Gateway Relay 1.0
	- WPMU Assist 1.0.2

Active Plugins: (21)
	- bbPress 2.5.3
	- bbPress Admin Bar Addition 1.7.1
	- BuddyPress 1.9.2
	- BuddyPress Multilingual 1.4.2
	- BuddyPress Toolbar 1.6.0
	- CodeStyling Localization 1.99.30
	- Contact Form 7 3.7
	- Events + 1.7.2
	- FirmaSite Theme Enhancer 1.2.5
	- Google Maps 2.7.1
	- Hotfix 1.0
	- LearnDash LMS 1.5.0.1
	- Loco Translate 1.4.1
	- Membership Premium 3.4.6.1
	- ServerBuddy 1.0.5
	- Subscribe by Email 2.5.1
	- System Snapshot Report 1.0.0
	- WPML Media 2.1.1
	- WPML Multilingual CMS 3.0.1
	- WPMU DEV Dashboard 3.4.1
	- WP Multibyte Patch 1.9

Inactive Plugins: (10)
	- Duplicator 0.5.2
	- Groups 1.4.7
	- Installer 0.7.1
	- Maintenance Mode 5.4
	- POEditor 0.9.3
	- Quick Localization (Quick Localisation) 0.0.9
	- Remember Me Checked 1.0.1
	- vBsocial Goals 2.0
	- WPTB Language 1.0.1
	- xili-dictionary 2.4.0

### End System Info ###

[Moderator Note: Please post log files between backticks or use the code button.]

Plugin still isn’t working. Description of the problem hasn’t changed.

Where can the dev 5.2 version be found? I’m encountering a similar error when trying to install. 38 update errors along these lines:

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'FROM wp_agm_maps LIMIT 0, 25001' at line 1

Prod:
OS Type Linux gmot 2.6.32.45-grsec-2.2.2-r3 #8 SMP Mon Oct 10 13:33:17 PDT 2011 x86_64
Server Software Apache
PHP Version 5.3.27
MySQL Server 5.1.56-log
Memory Limit 128 MB

local development on MacBook Pro
DesktopServer Limited edition version 3.6.1 Build 1103
MySQL 5.1.44
Apache/2.4.4 (Unix)
PHP/5.4.19
OpenSSL/1.0.1e
mod_perl/2.0.8-dev Perl/v5.16.3
Database client version: libmysql – mysqlnd 5.0.10 – 20111026 – $Id: e707c415db32080b3752b232487a435ee0372157 $
PHP extension: mysql