Hi @Celina,
We support our add-on in the latest version of Edge-- I'd recommend either update to the new version of Edge or using one of our other supported browsers.
Additionally, WebGL might be causing an issue with the graphics card on your computer. Can you try toggling WebGL off? This can be done by selecting View > Rendering > Use WebGL and un-selecting this option. For help with disabling WebGL, please see this Community post (in English).
Finally, could you try opening your document in a private or incognito window to help us narrow down the potential cause? Could you also try connecting to a different network or disconnecting from your VPN (if applicable)? Sometimes account performance issues can be related to internet security/speed or browser issues.
Let me know if this helps!