Is not clear from your log (because you renamed it. never rename a file, but ZIP it) if it's the Couatl.ERR or the Couatl.LOG.
The Couatl.ERR is just the panic log that shows just the error, but it doesn't give enough details about it. When troubleshooting a problem, you should enable Logging in the settings, and when the error happens, post the Couatl.LOG file, which is more detailed.
Don't rename the file, but ZIP it and attach the ZIP file to a post, so we are sure which file you posted.