I would like to unsubscribe from Event Invitations

Crikey! There was an error...
Whoops \ Exception \ ErrorException (E_CORE_WARNING)
Module 'pdo_mysql' already loaded Whoops\Exception\ErrorException thrown with message "Module 'pdo_mysql' already loaded" Stacktrace: #0 Whoops\Exception\ErrorException in Unknown:0
Stack frames (1):
0 Whoops\Exception\ErrorException
Unknown0
Open: Unknown

Environment & details:

empty
empty
empty
Key Value
25abff64eb93a874cdb738f2ec3cf98b en-GB
Key Value
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Key Value
PHP_INI_SCAN_DIR /home/pmi/.sh.phpmanager/php56.d
PATH /usr/local/jdk/bin:/usr/kerberos/sbin:/usr/kerberos/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/usr/X11R6/bin:/usr/local/bin:/usr/X11R6/bin:/root/bin:/opt/bin
PWD /home/pmi/public_html/w
TZ Europe/Sofia
SHLVL 0
PATH_TRANSLATED /home/pmi/public_html/en/events/224-unsubscribe-subscribe
PATH_INFO /en/events/224-unsubscribe-subscribe
SCRIPT_NAME /w/index.php
REQUEST_URI /w/index.php/en/events/224-unsubscribe-subscribe
QUERY_STRING
REQUEST_METHOD GET
SERVER_PROTOCOL HTTP/1.1
GATEWAY_INTERFACE CGI/1.1
REMOTE_PORT 45978
SCRIPT_FILENAME /home/pmi/public_html/w/index.php
SERVER_ADMIN webmaster@pmi.bg
CONTEXT_DOCUMENT_ROOT /home/pmi/public_html
CONTEXT_PREFIX
REQUEST_SCHEME https
DOCUMENT_ROOT /home/pmi/public_html
REMOTE_ADDR 3.236.170.171
SERVER_PORT 443
SERVER_ADDR 193.107.36.199
SERVER_NAME pmi.bg
SERVER_SOFTWARE Apache
SERVER_SIGNATURE
HTTP_X_HTTPS 1
HTTP_CONNECTION close
HTTP_HOST pmi.bg
HTTP_ACCEPT_ENCODING br,gzip
HTTP_ACCEPT_LANGUAGE en-US,en;q=0.5
HTTP_ACCEPT text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
HTTP_USER_AGENT CCBot/2.0 (https://commoncrawl.org/faq/)
SSL_TLS_SNI pmi.bg
HTTPS on
SCRIPT_URI https://pmi.bg/w/index.php/en/events/224-unsubscribe-subscribe
SCRIPT_URL /w/index.php/en/events/224-unsubscribe-subscribe
UNIQUE_ID YNBn-_jBR1orXNbyfaj-ZAAAAM4
FCGI_ROLE RESPONDER
PHP_SELF /w/index.php/en/events/224-unsubscribe-subscribe
REQUEST_TIME_FLOAT 1624270843.4447
REQUEST_TIME 1624270843
Key Value
PHP_INI_SCAN_DIR /home/pmi/.sh.phpmanager/php56.d
PATH /usr/local/jdk/bin:/usr/kerberos/sbin:/usr/kerberos/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/usr/X11R6/bin:/usr/local/bin:/usr/X11R6/bin:/root/bin:/opt/bin
PWD /home/pmi/public_html/w
TZ Europe/Sofia
SHLVL 0
PATH_TRANSLATED /home/pmi/public_html/en/events/224-unsubscribe-subscribe
PATH_INFO /en/events/224-unsubscribe-subscribe
SCRIPT_NAME /w/index.php
REQUEST_URI /w/index.php/en/events/224-unsubscribe-subscribe
QUERY_STRING
REQUEST_METHOD GET
SERVER_PROTOCOL HTTP/1.1
GATEWAY_INTERFACE CGI/1.1
REMOTE_PORT 45978
SCRIPT_FILENAME /home/pmi/public_html/w/index.php
SERVER_ADMIN webmaster@pmi.bg
CONTEXT_DOCUMENT_ROOT /home/pmi/public_html
CONTEXT_PREFIX
REQUEST_SCHEME https
DOCUMENT_ROOT /home/pmi/public_html
REMOTE_ADDR 3.236.170.171
SERVER_PORT 443
SERVER_ADDR 193.107.36.199
SERVER_NAME pmi.bg
SERVER_SOFTWARE Apache
SERVER_SIGNATURE
HTTP_X_HTTPS 1
HTTP_CONNECTION close
HTTP_HOST pmi.bg
HTTP_ACCEPT_ENCODING br,gzip
HTTP_ACCEPT_LANGUAGE en-US,en;q=0.5
HTTP_ACCEPT text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
HTTP_USER_AGENT CCBot/2.0 (https://commoncrawl.org/faq/)
SSL_TLS_SNI pmi.bg
HTTPS on
SCRIPT_URI https://pmi.bg/w/index.php/en/events/224-unsubscribe-subscribe
SCRIPT_URL /w/index.php/en/events/224-unsubscribe-subscribe
UNIQUE_ID YNBn-_jBR1orXNbyfaj-ZAAAAM4
FCGI_ROLE RESPONDER
PHP_SELF /w/index.php/en/events/224-unsubscribe-subscribe
REQUEST_TIME_FLOAT 1624270843.4447
REQUEST_TIME 1624270843
0. Whoops\Handler\PrettyPageHandler