There was an incident with another service that affected R2 but I only had Internal Errors when using the S3 API personally - this shouldn’t be an issue anymore though, is it working now for you?
I am having the same issue here. I’ve tried uploading files with both the AWS CLI and rclone.
Rclone for example gives the following error message on commands like tree or copy:
“InternalError: We encountered an internal error. Please try again. status code: 500, request id: , host id:”