You can send your smapi.log using this page:
https://smapi.io/log (there are instructions).
If you found your mod at Nexus, there is "Requirements" on the "Description" tag. Open it and it tells if you need other mods to run yours (mods adding e.g. maps usually have those).
Install the required other mods and retry.
If the mod maker has been careful, SMAPI should "yell red" already when you start the game, refusing to run mods whose requirements aren't there.
(It's 2 AM here, to be continued later if needed...)