Make sure that after applying the update you have reconfigured the connector.
And also make sure that before reconfiguring the connector you take a backup of previous connector folder, as CF will not retain any changes that you may have done on connector properties/files.
Once reconfigured, please check once again and let us know.
Is there a guide on how to do that?
Launch the web server configuration (you can type the same in the search bar when you click on start button on windows platform) tool as Run as Administrator and then remove the connector for the website/websites or might be showing with the name "All"
Then click Add and leave all the options as it is and choose "All" if you want a single connector for all the Websites else you can create individual connector for each website
NOTE : Make sure you do the above in the maintenance window
Thank you very much indeed! Reconfiguring the connector solved the problem.
Greetings from Switzerland