KOL-521-catch-and-display-errors-for-participation-request: added...
KOL-521-catch-and-display-errors-for-participation-request: added 'display_all_existing_errors_and_warnings' to our error catching mechanism
KOL-521-catch-and-display-errors-for-participation-request: added 'display_all_existing_errors_and_warnings' to our error catching mechanism