I think I found a bug in VisualGDB version 184.108.40.20610. I cannot import hardware registers from a .SVD file (attached).
I ran my firmware and stopped at a break point, then opened the Hardware Registers window. I clicked on “Import registers from an SVD file or a VisualGDB register definition file” link and opened PAC55XX.svd, and got the following exception:
The error you mentioned happens because the imported SVD file does not define sizes for some registers. We have updated VisualGDB to assume 32-bit registers when the size is not specified: VisualGDB-220.127.116.1146.msi
That said, the file you attached to the second message appears broken (it triggered an error about mismatching <peripherals> tag), so it will not get imported despite the fix.