mismatched entity and/or field definitions The node.field_flexslider_example_slidesh field needs to be uninstalled.

Comment #60osman CreditAttribution: osman as a volunteer commented 2 years ago
If you have Devel module installed, you can also use the "Execute PHP Code" page at http;//example.com/devel/php

try {
\Drupal::entityDefinitionUpdateManager()->applyUpdates();
}
catch (EntityStorageException $e) {
print_r($e);
}