Found a bug, have you? Please report any bugs, issues, problems here.

Some common bugs you may encounter:
There is a piece that won't play,
There is a piece that reads 0:00 in the playlist,
The playlist keeps getting stuck on the same piece,
There is a piece that is too loud/quiet,
There is a piece that plays during peacetime that should only play when at war,
There is a piece that plays during an ahistorical play-thru that should only play for National Socialist Germany,
There is a piece that plays that violates Defeatism or the Nuremberg Laws when playing as National Socialist Germany,
There is a piece in the wrong station,
Your error.log reports a piece that is less than 44.1khz,
Your error.log reports a piece that cannot be found,
Your error.log reports there is an error on/near the line of whatever number.

If you encounter any of the above listed, then please report the bug you encountered, including what the bug is and the name of the piece. If you found it in your error.log, please include the error from the log along with the name of the piece, if applicable. Please don't submit your entire error.log since they can get really long, just copy & paste the particular line/sentence/error from it.

If you installed the mod and it does not seem to be working, please review these common problems before posting a bug:
•Problem: I have installed the mod, but it doesn't work/Station not present.
Solution: Ensure the mod is enabled in your Playset: 1). On the left side of the Launcher click on "Playsets"; 2). In the top right corner select "Add More Mods"; 3). from here you should see the mod, select it with the checkbox checkmarked; 4). in the bottom left corner, after it became green, click on "Add 1 To Playset"; 5). finally, click on "Home" on the left side of the Launcher to get back to launch.
•Problem 2 derived from 1: I have ensured that the mod is enabled in my Playset, but it is still not working.
Solution: 1). Uninstall the mod completely: Simply click on the green button on the mod's Description page to unsubscribe and then afterwards, following the path C:\Users\"your username"\Documents\Paradox Interactive\Hearts of Iron IV\mod (or wherever you have your have Documents folder), ensure there is nothing left of the mod, including the "ugc_2579727090.mod" file. 2). After doing so, launch the Paradox Launcher and ensure the mod is not listed in your Playset. Close the Launcher and install the mod anew. Relaunch the Launcher and ensure the mod is enabled in your Playset (cf., Problem 1).
•Problem 3 Derived from 2: I have uninstalled the mod completely and reinstalled it. However, it's still not working.
Solution: Verify the integrity of the game files: 1). From your Steam Library, right click the game and click on "Properties"; 2). Click on Local Files; 3). Click on "Verify integrity of game files..."; 4). Allow the process to complete. If you are missing something, Steam will download and install it.
•Problem 4 derived from 3: I have done that even and it still doesn't work.
Solution: Uninstall HoI4 completely. If there is any left over files in your Steam directory after doing so for HoI4, delete them manually. Install the game anew and then your mods.
•Problem 5 derived from 4: Nope, still nothing.
Solution: Well, probably not really a solution, but you need to legally purchase and install a legal game, you high seas sailor you -- Argh, ye matey!
•Problem 6 derived from 5: How dare you insult me, sir, I be not a pirate!
Solution: Then, report your bug. However, unless it is being reported wide-spread, I may not have a solution for you -- your game is likely suffering something catastrophic and unknown.
•Different Problem: My Launcher is trying to download a/the mod that doesn't exist. (especially prevalent for original UGMC users).
Solution: Check to ensure that you have no mods installed that have since been deleted from Steam. Indeed, a deleted mod from Steam isn't removed from the Launcher. Via Steam*,
1). Go your Library > open HOI4 > second from the right, open "Workshop" > on the right, locate "Your Workshop Files" and "Your Files" click on "Subscribed items"; 2). Go through each of your subscribed mods and check if you get the error, "Sorry! An error was encountered while processing your request: There was a problem accessing the item. Please try again. Here's a link to the Steam Community home page." This means the mod has since been deleted and your Launcher is still trying to access it.
*Note: In the Launcher itself, it will say "This mod is not present on the disk. Subscribe to it or remove it from the playset.", accompanied with a red triangle with an exclamation mark (!). Below "Enabled" in green, you'll see an X -- in which you hover will say "Remove from Playset" -- accompanied with an ellipsis (...) -- in which you hover over will say "Open in Steam Workshop". If select the ellipsis and try to open the mod (it will redirect not to the Steam client rather your browser), and, if the mod has since been deleted, this too will give you the above error.
Now, to actually fix it: 1). Click on "unsubscribe" in Steam; and 2). open the Paradox Launcher and below the green "Enabled", click on the X ("Remove from the Playset").
•Problem 1 derived from the previous: I have checked Steam and ensured that I'm not superscribed to a mod since deleted, however, the problem persists.
Solution: 1). Unsubscribe from all mods in both the Steam Workshop and the Paradox mod site mods.paradoxplaza.com; 2). Delete the folder Documents/Paradox Interactive/Hearts of Iron IV/mod/; 3). Delete the file Documents/Paradox Interactive/Hearts of Iron IV/mods_registry.json (if present) and the launcher-v2.sqlite (if present); 4). Launch the Launcher to ensure no mods are installed and there's no errors; 5). Close the Launcher and install your mods anew.
•Problem 2 derived from 1: I have removed both my mods_registry.json and launcher-v2.sqlite, but it's still not working.
Solution: In Windows, locate and uninstall the Launcher via add/remove programs via the Control Panel or Settings > Apps & Features. After doing so, launch the game from Steam and allow the Launcher to install anew. You may have to verify the integrity of the game files.

Just so you're aware, I am indeed willing to assist you with issues that aren't mod related, such as with the Paradox Launcher, for example, or with the game itself. Mod related or not, being as descriptive as possible with your issue; elaborating where and as much as you can; even including a screenshot (via Imgur so that you can share in your post), if so applicable; and including any steps/actions taken on your part would all be very helpful in helping me to help you. Indeed, the more descriptive you are, the better I'll be able to assist you. Just know, however, I may refer you to the official Paradox Tech Support Forum[forum.paradoxplaza.com] (an account there is required). Not because I don't want to help you, rather because either 1). I may not know or fully understand your issue, or 2). I legit don't know. Likely #2, but if it is #1 I'll try to clarify that with you. Nonetheless, I will do my best to help you out so that you can get back to bringing about the new world order. :)