Hello,
This is a permissions error. It says that the file is in "read-only" mode. which means either of those things:
- you have the file open in some program that locks it.
- you do not have the privileges to write in the output directory.
To fix this - close any open apps that might lock the file. Some of those might require a forced kill from the task manager.
- make sure that the permissions for the folders are both read and write.
Best,
Natalja