Webmail folders missing

I don't know if this is the right place to post my question because this is the most complicated, convoluted and confusing system I have ever encountered.  Anyway, suddenly today (Oct 1, 2023) my webmail page is looking different, all menu items have been replaced with icons and all my personal folders have disappeared along with their contents.

I don't know whom to contact about it and how and any help will be appreciated.

Even the "tags" entry box is a mess and adds strange items like "packet loss" and "bandwidth allowance"  on its own with no visible way to exclude them.  I added a single tag called Email Folder and it said "Content not tagged" and "You've exceeded the maximum number of tags for this post" so if this post gets published, it will be a miracle.