Does items using divine magic work? Items that cast divine spells without being exclusive to divine casters (wands)?
If more than an introduction to the situation or a very short effect (like a single room or encounter), a plot that deprives certain characters of their abilities is grossly unfair. Back in in 1E, when casters could be said to dominate the game at higher levels, it sort of made sense. But not since 3E.
This is obviously something arcane casters are much more vulnerable to - divine casters generally have some martial abilities to fall back on, especially at lower levels.
As a divine caster, I might camp outside the place and provide a base for the others to return to. This shows the GM how much a plot like this is appreciated. Perhaps there is an NPC the divine caster can play for a change of pace? On the other hand, this might give the party an appreciation of how important divine magic really is.