Hmm. I’ve found some people reporting a bug with Windows 7 that sounds just like this. The bug is with something called Electron, which is used by Makerverse (here’s one link I read).
Long story short, the current version of Makerverse uses an old version of Electron. This is because Makerverse came from CNCjs, which hadn’t been updated in a long time. I am presently working on a new version of Makerverse which updates everything to use the latest versions, but it’s a big project. I don’t expect to be done soon enough to be helpful to you.
In the mean time, you might be able to get around the problem by upgrading .NET on your computer. The first link, above, describes this as a solution to the problem, though again it seems to be talking about Windows 7, perhaps it still applies. At least, the latest version cannot hurt. Here’s the download site: Download .NET Framework | Free official downloads