Title says everything, really. I can't remove series from the reading list when in the reading list page, however if I go directly to the series's page then I can remove it.
I just checked your account and everything seems to be working fine. It seems like it might be a problem on your side. Can you try switching browsers and try again? It could be that one of your add-ons is blocking it.
Ah, I've found the problem. Digging a bit into the code, for some reason the variable 'seriesExtras' is not being created when I use Edge, which causes it to be unable to remove the series. For now I guess I'll just use a different browser.