Hi,
I loaded your mod into a save that had Rampant and got this error:
75.410 Error MainLoop.cpp:1288: Exception at tick 26005148: The mod Rampant (3.3.3) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event Rampant::on_tick (ID 0)
The mod Plantable & Printable Trees (1.2.0) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event Blueprintable-Plantable-Trees::script_raised_built (ID 79)
Blueprintable-Plantable-Trees/control.lua:16: attempt to index field 'created_entity' (a nil value)
stack traceback:
Blueprintable-Plantable-Trees/control.lua:16: in function 'processEvent'
Blueprintable-Plantable-Trees/control.lua:36: in function <Blueprintable-Plantable-Trees/control.lua:35>
stack traceback:
[C]: in function 'create_entity'
Rampant/libs/Processor.lua:677: in function 'processPendingUpgrades'
Rampant/control.lua:990: in function <Rampant/control.lua:969>

Link to fixed mod - https://mods.factorio.com/mod/Blueprintable-Plantable-Trees-RampantFix

I fixed the issue, its caused by line 16 of control.lua trying to access the name method of "event.created_entity"

it was - if event.created_entity.name == 'tree-sapling' then

now it's - if event.created_entity ~= nil and event.created_entity.name == 'tree-sapling' then

Thx for the hint. I'll apply the same fix.