Fatal error: Uncaught Error: Class "Drupal\Core\Block\BlockBase" not found in /home/yrdsb11w3creativ/public_html/YRDSB-Zips/D9/modules/custom/york_misc/src/Plugin/Block/GoogleCalendarBlock4.php:25
Stack trace:
#0 {main}
thrown in /home/yrdsb11w3creativ/public_html/YRDSB-Zips/D9/modules/custom/york_misc/src/Plugin/Block/GoogleCalendarBlock4.php on line 25