Steven, another customer reported the same problem about a week ago. His Excel VBA app with iGrid 5 stopped working after upgrade to Office Build 2607. I asked this customer to join our discussion so we could try to find a solution together.
The hex error code is &H80004005, not &H30004005, and all this looks like the result of an updated Microsoft Office Trust Center security setting related to ActiveXs; my AI helpers confirm that. However, their advice to enable ActiveX controls doesn't help:
Trust Center route: File → Options → Trust Center → Trust Center Settings → ActiveX Settings → select "Prompt me before enabling all controls with minimal restrictions," then OK.
We will continue to look for a solution to the problem or at least some kind of explanation, and as soon as we have new information, we will post it here. But for now, it seems clear that this is most likely not an iGrid issue.