Hi @scvbelle 
The error message you're seeing is caused by an IllegalArgumentException error due to the restriction in Azure Blob File System (ABFS) that does not allow files or directories to end with a dot. This error is thrown by the trailingPeriodCheck method in the AzureBlobFileSystem class of the ABFS client, indicating that the naming rule is violated.In order to solve this issue, you should ensure that none of your files or directories in ABFS end with a dot. This rule applies to all operations involving ABFS, including creating, renaming, and moving files or directories.
Can you check if any of the source files are ending with dot ?