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No. There are no squatters rights. Even if there were, it would not apply in the scenario you describe. Squatters rights are a form of adverse possession. In adverse possession you must occupy land in a manner that is contimuous, open and hostile to the owners interest for many years. In the scenario that you describe, there is nothing hostile about the occupancy. The chuurch agreed to the occupancy. The church can also then agree to terminate the occupancy or seek rent for the occupancy. That would be within its rights as the owner of the property.
I checked. There is no such action and it would not apply to the facts provided where the person was allowed to stay by the land owner by agreement.
A squatter or trespasser is someone who enters the premises without the permission of the legal occupant or the owner. This situation comes up primarily when a legal tenant shares the premises by subletting to another tenant. Then the original tenant either leaves voluntarily or is evicted. The subletting tenant, while having had a claim in the legal tenant, has no such claim on the owner of the property.
What else are you seeking? I have indicated the law as it exists. If you have further questions or if you do not understand the answer, I will be happy to assist further.
I find it astounding that you can leave negative feedback on a thorough and accurate answer simply because you do not like the result. If you do not like the answer I would prefer you go elsewhere and do not accept.