Some issues have been reported by the community (in older 4x. version) but we'd need to review them, specifically:

Calendar Back/Next buttons
Description
The arrows to navigate from one month to the other are not clearly described (Previous/Next). They should rather be described as Previous Month/Next Month
Possible solutions
Could not find a particular text for calendar navigation in the text strings, looks like a rather general Previous/Next text.

Preferences / Manage dowloads
Description
The trash icon for the section “Total used space” is a button without name (the two other icons have one).
Possible solutions
It should be given a name with an aria-label

My courses
Description
The title of the page (My courses) is not in h1, the title of the app is in h1 instead. The hierarchy is correct on the other tabs of the app.
Possible solutions
Change hierarchy of titles

Dashboard Search
Description
The search option (available course) uxdoes not work if less than 3 characters are entered. However, this is nowhere indicated for the user.
As example if we type “UX”, we do not get any result. By typing “UX “, we get our ux courses showing.
Possible solutions
If there is a restriction it should be indicated in the label or with an aria-describedby

There are more issues that we'd need to triage and then review