The description is not clear, but I assume you are hitting an error when trying to submit additional information for a bug report you have filed with NVIDIA.
NVIDIA’s bug reporting mechanism includes aggressive guards against the injection of harmful content. When these trigger, incomprehensible error message result. This has been a significant problem for many years running; apparently NVIDIA doesn’t want to invest in fixing it.
It would be counterproductive for NVIDIA to reveal what items can trigger the guards. I have never been able to make out a pattern on what material the bug reporting system accepts and what material it objects to.
The only workable strategy seems to be to submit bug information in small fragments, noting in the report why you are doing so. It’s a major pain in the behind for sure.