At one point, dotphoto had an issue uploading to new albums that were named with numbers: for instance, "2018 photos" rather than "Photos 2018". This has been fixed.
Security errors may be caused by unsupported browsers (for instance, Microsoft IE is no longer supported by Microsoft; we recommend Chrome for the best results.) Uploading unsupported files can also result in security errors.
The main Upload FAQ has current information about uploading requirements plus a troubleshooting section. Please click here.