When trying to share to Screencast from Camtasia 2018 or earlier I am seeing the following error.
"Camtasia could not upload the video to Screencast.com An error occurred during the upload process."
We have identified an issue with how certain versions of Snagit and Camtasia communicate with Screencast.com. Newer versions of the products have been updated to correct this issue. Unfortunately, it is not something we are able to fix in older versions. As a result, the Screencast.com sharing output will be turned off in those older versions. All other aspects of the product will continue to work as expected.
If you are running Camtasia 2019 or later, and having issues please make sure you have the latest version of Camtasia installed. From the menu bar, select Camtasia > Check for Updates to install the latest version.
If you are running Camtasia 2018 or earlier, the Output for Screencast will no longer work, however you can share the mp4 locally, and then upload it directly on Screencast.