Cant install plugins from dashboard. showing 'ERROR' in red font

I use the dashboard in many sites. but in 2-3 sites suddenly, after having installed lot of plugins, is suddenly showing a ERROR in red when clicked on 'install'.

can you please advice. I can share creds with staff if necessary. peace

  • Oneness

    nothing all all. only the RED ERROR.
    Mysteriously, I didn't find support info but System Info which is given below with some lines asterisked out:

    PHP
    Version 5.3.26
    max_execution_time 30
    open_basedir
    memory_limit 256M
    upload_max_filesize 64M
    post_max_size 64M
    display_errors 1
    log_errors 1
    track_errors
    session.auto_start 0
    session.cache_expire 180
    session.cache_limiter nocache
    session.cookie_domain
    session.cookie_httponly
    session.cookie_lifetime 0
    session.cookie_path /
    session.cookie_secure
    session.gc_divisor 100
    session.gc_maxlifetime 1440
    session.gc_probability 1
    session.referer_check
    session.save_handler files
    session.save_path /tmp
    session.serialize_handler php
    session.use_cookies 1
    session.use_only_cookies 1
    error_reporting 4983
    E_ERROR
    E_WARNING
    E_PARSE
    E_CORE_ERROR
    E_CORE_WARNING
    E_COMPILE_ERROR
    E_USER_ERROR
    E_USER_WARNING
    E_RECOVERABLE_ERROR
    E_ALL
    MySQL
    Version 5.5.34-cll
    Driver mysql
    key_buffer_size 16 MB
    max_allowed_packet 8 MB
    max_connections 100
    query_cache_limit 1 MB
    query_cache_size 16 MB
    query_cache_type ON
    WordPress
    Version 3.8
    ABSPATH /home/******/public_html/website/
    WP_CONTENT_DIR /home/******/public_html/website/wp-content
    WP_PLUGINS_DIR undefined
    SUNRISE on
    UPLOADBLOGSDIR undefined
    UPLOADS undefined
    SUBDOMAIN_INSTALL 1
    DOMAIN_CURRENT_SITE ***********.com
    PATH_CURRENT_SITE /
    SITE_ID_CURRENT_SITE 1
    BLOGID_CURRENT_SITE undefined
    COOKIE_DOMAIN .***********.com
    COOKIEPATH /
    SITECOOKIEPATH /
    DISABLE_WP_CRON undefined
    ALTERNATE_WP_CRON undefined
    DISALLOW_FILE_MODS undefined
    WP_HTTP_BLOCK_EXTERNAL undefined
    WP_ACCESSIBLE_HOSTS undefined
    Web Server
    Software Apache
    Version 2.2.26
    Address 192.232.***.**
    Host ********.com
    Remote HTTP Requests
    WPMU DEV: GET OK
    WPMU DEV: POST OK
    PayPal API: POST OK

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