archives & categories messed up in sidebar

Sheesh. How did I do that? I have screwed up my sidebar and now when I click on any of the archive months,or anything in the catories section it takes me to a page of code instead of the actual page.

On the archives page, I can see that it wants to take to a non-existing page so I think I’ve deleted something. For instance, December archives would be at https://blog.barbaraboone.com/?m=200512 (and obviously 200511 for November, etc.) – I don’t know if I’m on the right track, but it appears that it’s now a non-existent page.

I think I may be able to get the categories fixed by going back to that section and changing it to what they read now…I just don’t know how I messed it up (to avoid this in the future) and I definitely haven’t been able to figure out what on earth I did with the archives page.

Any ideas? I don’t know if it helps, but my page is at https://blog.barbaraboone.com . I use the Ocadia theme. Thank you!