Warning: The URL …

Hey Roland, Since the last update getting this error message at top of my WP dashboard:

Warning: The URL https://xnau.com/xnau-updates/?action=get_metadata&slug=pdb-custom-templates&installed_version=0.3&php=5.6.30&locale=en_CA&checking_for_updates=1 does not point to a valid metadata file. WP HTTP Error: cURL error 35: gnutls_handshake() failed: A TLS fatal alert has been received. in /hermes/bosnaweb21a/b412/ipg.esquimaltribfest/wp/wp/wp-content/plugins/participants-database/vendor/aux-plugin-update/Puc/v4p1/UpdateChecker.php on line 297 Warning: The URL https://xnau.com/xnau-updates/?action=get_metadata&slug=pdb-email-expansion&installed_version=1.8.9&php=5.6.30&locale=en_CA&checking_for_updates=1 does not point to a valid metadata file. WP HTTP Error: cURL error 35: gnutls_handshake() failed: A TLS fatal alert has been received. in /hermes/bosnaweb21a/b412/ipg.esquimaltribfest/wp/wp/wp-content/plugins/participants-database/vendor/aux-plugin-update/Puc/v4p1/UpdateChecker.php on line 297 Warning: Cannot modify header information – headers already sent by (output started at /hermes/bosnaweb21a/b412/ipg.esquimaltribfest/wp/wp/wp-content/plugins/participants-database/vendor/aux-plugin-update/Puc/v4p1/UpdateChecker.php:297) in /hermes/bosnaweb21a/b412/ipg.esquimaltribfest/wp/wp/wp-admin/includes/misc.php on line 1124 Warning: Cannot modify header information – headers already sent by (output started at /hermes/bosnaweb21a/b412/ipg.esquimaltribfest/wp/wp/wp-content/plugins/participants-database/vendor/aux-plugin-update/Puc/v4p1/UpdateChecker.php:297) in /hermes/bosnaweb21a/b412/ipg.esquimaltribfest/wp/wp/wp-includes/option.php on line 919 Warning: Cannot modify header information – headers already sent by (output started at /hermes/bosnaweb21a/b412/ipg.esquimaltribfest/wp/wp/wp-content/plugins/participants-database/vendor/aux-plugin-update/Puc/v4p1/UpdateChecker.php:297) in /hermes/bosnaweb21a/b412/ipg.esquimaltribfest/wp/wp/wp-includes/option.php on line 920

Not sure if it is unique to me…

The page I need help with: [log in to see the link]