The mentioned error “Class to be executed Could not be found” occurs only if the class file for your function code is missing. If you had uploaded the code via the Catalyst Console, kindly make sure you have uploaded it along with the class files to resolve the first issue. Else if you have initialised your function via CLI, you can use the command “catalyst deploy” which will compile the code automatically and upload it to the Catalyst Environment from your system. You can find the help documentation for the same here.