allow_url_fopen runtime configuration

When I open page in Chrome browser: I got the following error (thanks for any help!)

While trying to retrieve events, Google returned an error:
The stream IO handler requires the allow_url_fopen runtime configuration to be enabled
Please ensure that both your Google Calendar ID and API Key are valid and that the Google Calendar you want to display is public.
Only you can see this notice.

https://www.citizensforaccountablegovernment.org/calendar

Calendar ID is correct, and the API has been recreated and using a fresh one.
Log:

### WordPress Installation ###

Site Name: Citizens For Accountable Government
Home URL: https://www.citizensforaccountablegovernment.org
Site URL: https://www.citizensforaccountablegovernment.org
Version: 4.3.1
Locale: en_US
Timezone: America/Chicago
Multisite: No
Permalinks: /%category%/%postname%
WP Memory Limit: 40 MB
WP Debug Mode: No
Script Debug: No

### Active Theme ###

Theme: Thesis – 1.8.5
Child Theme: No
Parent Theme: –

### Active Plugins ###

UpdraftPlus – Backup/Restore: 2.11.18.22
Simple Calendar: 3.0.6
Wordfence Security: 6.0.20
Post Type Switcher: 1.5
Social Polls by Wedgies.com: 1.3.4
Social Media and Share Icons (Ultimate Social Media): 1.3.2
Official StatCounter Plugin: 2.0.1
WP-Font-Resizer: 1.0
Akismet: 3.1.5

### Server Environment ###

Web Server: Apache
PHP Version: 5.4.43
MySQL Version: 5.5.42-37.1-log
Server Timezone: UTC
Display Errors: No
Safe Mode: No
Memory Limit: 256M
Upload Max Filesize: 50M
Post Max Size: 50M
Max Execution Time: 30
Max Input Vars: 1000
fsockopen: Yes
cURL: Yes
SOAP: Yes
SUHOSIN: No
WP Remote POST: Yes
WP Remote GET: No (Resolving host timed out: https://www.citizensforaccountablegovernment.org)

### Client Information ###

IP Address: 69.89.21.85
Browser: Chrome 46.0.2490.86 (Windows)

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