Depending on what type of mouse you have, you'll need to change the "Mouse Wheel Mode" which can be found under "tools > Mouse Wheel Mode"
Perhaps you're attempting to connect an input to and input, or an output to an output? These connections are not allowed
Tell me about it. From what I understand, only Chrome is able to run the site's code correctly. The site uses a number of admittedly fancy aspects of JavaScript - mainly "offscreen canvas" which allows the system's rendering engine to do its work on a separate process thread.
Though these features have been in the standard for a number of years now, it seems that Firefox and Safari do not have them implemented. I believe Edge and Opera do, but I haven't tested them yet.
I know. I've done all I can to fix it but it seems its a bug with Chrome that I just can't get around. I've registered the bug with them here, maybe you can encourage them to look into it https://bugs.chromium.org/p/chromium/issues/detail?id=1149413
My best advice right now is to avoid any unit that comes with a frame-rate adjust. The bug is centred around transferring images around, so, reducing the number of times that happens can really help.
Are you on Windows 10? I've seen this before, and I am sure I've fixed it; but if you're reading this I guess I haven't. You can fix it by adjusting the scaling in the control panel of windows. I'm still trying to fix it though