Notebook does not sync on Macbook?

Hi! I'm a new user of Zoho Notebook and I have grown to love it. I love the simplistic, easy to use interface and how aesthetically pleasing it is. I have gotten a lot more productive, and I love how it's free, which is something you tend to look for when you're a college student. I switched from Onenote to Evernote, and from Evernote to Notebook. However, I've run into a few problems.

I have the application downloaded on both my iPhone and my Macbook. On my iPhone, Notebook works fine, and it syncs my notebooks. However, when I log into my Notebook on my Macbook, it doesn't allow me to work from the downloaded app but rather a popup window (screenshot included for reference) It doesn't allow me to resize it, and if I do, gray blocks appear.

As well as this, everytime I upload a picture or screenshot for my notes, the Web Notebook automatically shrinks it to a tiny size. Is there a way to keep the size? I've change the resource quality to Large/Original.

In addition to these two problems/questions, is there any other highlight colours, or just the black in white text at the moment? I highlight by category, and would love it if Zoho added colours!

Another question I have is that the split screen view does not work for the app on Macbook. It won't allow me to split screen. Is this a problem with my Macbook, or is it that the app just doesn't support split screen functionality?

Images are too tiny.

Gray blocks appear when I try to maximise the window

The downloaded app does not sync to my web Notebooks

I use a iPhone 8, and the newest generation of Macbook Touchbar, if that helps answer the question.

Thank you in advance. :-)

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