Page numbering is broken
Since the latest update (InDesign 15.1.2) you can no longer change the page numbering to roman numerals or a, b, c etc. When you make a new section and change the style of numbering system - nothing changes. You can also not make a page have a new number - for example change page 10 to page 20, it will remain as page 10. These are very important features of InDesign and need to be fixed as soon as possible.
Step 1 - Menu - Layout - Number & section options
Step 2 - Change page 1 to style 'i, ii, iii, iv ...'
Expected result - pages numbered i, ii, iii etc.
Actual result - no change
Step 3: Change page 11 to page 1
Expected result - page 11 is now labelled as page 11
Actual result - no change
The issue was resolved by trashing preference and cache.
Marking this as solved as confirmed by the user.
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Adobe InDesign Team