Can't log into my webpage - Bug or Hacked?

Warning: Declaration of Jetpack_IXR_Client::query() should be compatible with IXR_Client::query(…$args) in /home/mwh2341/public_html/wp-content/plugins/jetpack/vendor/automattic/jetpack-connection/legacy/class-jetpack-ixr-client.php on line 122

Warning: Cannot modify header information - headers already sent by (output started at /home/mwh2341/public_html/wp-content/plugins/jetpack/vendor/automattic/jetpack-connection/legacy/class-jetpack-ixr-client.php:122) in /home/mwh2341/public_html/wp-content/plugins/jetpack/modules/sso.php on line 662

I can not even get access to my webpage anymore. This is what shows up on the log-in page for my webpage. Can this be fixed? what happened is it the theme Ildy or is the page hacked?

Thank you for any help.

Hey there

Its a plugin problem, please contact plugin support or simply deactivate it,
You may deactivate it from the FTP browser, just rename the plugin folder