Getting System.IO.FileNotFoundException on "start page"

Out of the blue I am suddenly getting an exception when trying to load /products/files

I can manually go to other routes like /management, but it seems to not be able to load css, js and socket io

I have tried restarting the server and monoserve/nginx, to no avail.

System.IO.FileNotFoundException

  at ASC.Web.Core.Utility.ColorThemesSettings.GetThemeFolderName (System.String path) [0x0008d] in <e7a44512199042febf49ada4cdf07641>:0 
  at ASC.Web.Studio.Masters.BaseTemplate+<>c__DisplayClass8.<AddStyles>b__6 (System.String r) [0x00012] in <4edd0b0a962d4454a147729becd417f9>:0 
  at ASC.Web.Core.Client.Bundling.BundleData.AddSource (System.Func`2[T,TResult] converter, System.String[] src) [0x0000a] in <e7a44512199042febf49ada4cdf07641>:0 
  at ASC.Web.Core.Client.Bundling.ResourceBundleControl.AddSource (System.Func`2[T,TResult] converter, System.String[] src) [0x00000] in <e7a44512199042febf49ada4cdf07641>:0 
  at ASC.Web.Studio.Masters.BaseTemplate.AddStyles (System.Func`2[T,TResult] converter, System.String[] src) [0x00037] in <4edd0b0a962d4454a147729becd417f9>:0 
  at System.Web.StudioMasterExtensions.RegisterStyle (System.Web.UI.Page page, System.Func`2[T,TResult] converter, System.String[] absoluteLessPath) [0x00018] in <4edd0b0a962d4454a147729becd417f9>:0 
  at ASC.Web.Files.Controls.Tree.Page_Load (System.Object sender, System.EventArgs e) [0x00017] in <2fb13c2c6ca24c678483544a55b98eb2>:0 
  at System.Web.UI.Control.OnLoad (System.EventArgs e) [0x00023] in <6be42e17951b438eaaf58a9aa197fc37>:0 
  at System.Web.UI.Control.LoadRecursive () [0x00028] in <6be42e17951b438eaaf58a9aa197fc37>:0 
  at System.Web.UI.Control.LoadRecursive () [0x0005a] in <6be42e17951b438eaaf58a9aa197fc37>:0 
  at System.Web.UI.Control.LoadRecursive () [0x0005a] in <6be42e17951b438eaaf58a9aa197fc37>:0 
  at System.Web.UI.Control.LoadRecursive () [0x0005a] in <6be42e17951b438eaaf58a9aa197fc37>:0 
  at System.Web.UI.Control.LoadRecursive () [0x0005a] in <6be42e17951b438eaaf58a9aa197fc37>:0 
  at System.Web.UI.Control.LoadRecursive () [0x0005a] in <6be42e17951b438eaaf58a9aa197fc37>:0 
  at System.Web.UI.Control.LoadRecursive () [0x0005a] in <6be42e17951b438eaaf58a9aa197fc37>:0 
  at System.Web.UI.Control.LoadRecursive () [0x0005a] in <6be42e17951b438eaaf58a9aa197fc37>:0 
  at System.Web.UI.Control.LoadRecursive () [0x0005a] in <6be42e17951b438eaaf58a9aa197fc37>:0 
  at System.Web.UI.Control.LoadRecursive () [0x0005a] in <6be42e17951b438eaaf58a9aa197fc37>:0 
  at System.Web.UI.Control.LoadRecursive () [0x0005a] in <6be42e17951b438eaaf58a9aa197fc37>:0 
  at System.Web.UI.Control.LoadRecursive () [0x0005a] in <6be42e17951b438eaaf58a9aa197fc37>:0 
  at System.Web.UI.Page.ProcessLoad () [0x0004a] in <6be42e17951b438eaaf58a9aa197fc37>:0 
  at System.Web.UI.Page.ProcessPostData () [0x00047] in <6be42e17951b438eaaf58a9aa197fc37>:0 
  at System.Web.UI.Page.InternalProcessRequest () [0x001a1] in <6be42e17951b438eaaf58a9aa197fc37>:0 
  at System.Web.UI.Page.ProcessRequest (System.Web.HttpContext context) [0x0005f] in <6be42e17951b438eaaf58a9aa197fc37>:0

Hello,
Please specify the version of Community Server you are using. Also open the developer tools in your browser (f12 in Chrome or Firefox) => reproduce the issue and check if there are errors in Network and Console tabs. Make screenshots of these errors.