Plugins : combine.dll [ . . . ]

That must be from a previous installation: the hosting domain for that plugin was taken down a month ago: https://community.notepad-plus-plus.org/topic/22645/combine-plugin-gone/7

I just took a fresh v8.3.2 32-bit portable, and installed those 5 plugins, one at a time, using the Plugins Admin. They all downloaded without hash errors, and installed with no problem.

Notepad++ v8.3.2   (32-bit)
Build time : Feb 26 2022 - 23:11:29
Path : C:\usr\local\apps\npp\npp.8.3.2.portable\notepad++.exe
Command Line : 
Admin mode : OFF
Local Conf mode : ON
Cloud Config : OFF
OS Name : Windows 10 Home (64-bit) 
OS Version : 2009
OS Build : 19043.1586
Current ANSI codepage : 1252
Plugins : BracketsCheck.dll ComparePlugin.dll HexEditor.dll mimeTools.dll NppConverter.dll NppExport.dll NppTextFX.dll NppXmlTreeviewPlugin.dll 

My guess is that something is getting in the way of the download, corrupting the zip files that Notepad++ downloads in order to install each of those plugins (because that’s what Notepad++ is doing: it downloads the zip file, looks at the hash, and then if it matches, it unzips and puts the files in the right location for your installation).

Since you show Windows 10 Enterprise, maybe it’s a corporate PC and your IT department is blocking the site(s) that those plugins download from – and that the “.zip” file that you’re getting is really a 404-not-found or some other “blocked” error. Or maybe you have a virus from elsewhere which is trying to infect any zips you download also. Or insert other wild guesses here.

As of now, my only help is “it works for me”.

Alternatively, you could go download the plugins manually (the plugins admin listed a website for each of those), and you could download the 32bit version of each plugin, and install it manually (unzip into c:\program files (x86)\Notepad++\plugins\ directory hierarchy, and/or unzip to temporary folder and use the Settings > Import > Import Plugins…)