Update
Please follow this guideline to update your YellowCube Magento 2 Extension in an existing installation.
Composer
If you have already installed your plugin through Composer the easiest way to update is to run the following commands:
composer update swisspost-yellowcube/magento2-yellowcube
bin/magento setup:upgrade
Always test after updates
Make sure to test the connection after any update.
We recommend you to go to the YellowCube configuration page and hit Save config.
Additionally, we highly recommend you to check updating a product and place an order to make sure everything works as expected.
If there is an unexpected error message, first double check the certificate path and filename matches the configuration.