Help with Stardew Valley Expanded Mod on ROG Ally

My wife has been wanting to play the Stardew Valley Expanded Mod for a long time now. She has the ROG Ally and was going to download the Mod. She downloaded Smapi and did all the steps that were required for the windows version of the mod, but when she dragged the Stardew Valley Expanded Mod over to the Mod file is started to download extremely slowly. Like, started almost 15 hours ago and is on 8%. We have good Internet and it seems like everyone who made a video on the process never ran into this issue. Can someone help us figure out what we need to do to get the Mod running on the ROG Ally?
 
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