diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2dc787aa..9061bd2b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,6 +13,18 @@ Anything under **Upgrade notes** is something you have to do, not something we d
 This section collects changes as they land; the release process turns it into a numbered entry when
 a version is cut.
 
+### Fixed
+
+- **The dashboard no longer fails on shared hosting.** To decide which update instructions to print,
+  ProjectSend asks whether it is running inside a container by looking for a file in the root of the
+  filesystem. On shared hosting PHP is usually confined to your own directory, and looking outside it
+  is treated as an error rather than as a "no" — so the one page that asks the question, the
+  dashboard, returned a 500 while every other page worked. It now takes the restriction as the answer
+  it always was: a server that keeps PHP inside a single directory is not our container image, and
+  gets the manual update instructions, which is correct for shared hosting anyway. Nothing to change
+  on your side, and no setting you would have been able to change if there were.
+  ([#1663](https://github.com/projectsend/projectsend/issues/1663))
+
 ## 2.1.0 — 18 August 2026
 
 Updating, mostly. ProjectSend now tells you when there is a new version, ends an update somewhere
diff --git a/app/Modules/Platform/Installation/Installation.php b/app/Modules/Platform/Installation/Installation.php
index 7ccb88e2..d3a5b9ef 100644
--- a/app/Modules/Platform/Installation/Installation.php
+++ b/app/Modules/Platform/Installation/Installation.php
@@ -43,6 +43,15 @@ class Installation
     protected function inContainer(): bool
     {
         // Docker writes the first; Podman writes the second.
-        return file_exists('/.dockerenv') || file_exists('/run/.containerenv');
+        //
+        // Suppressed, and it has to stay that way. Shared hosting sets
+        // open_basedir to the webspace, and probing a path outside it is a
+        // warning rather than a false — which the framework's error handler
+        // turns into an exception, so the one call that asks which install
+        // this is took the whole dashboard down with it (#1663). Under `@`
+        // the warning is filtered and the probe answers false, which is the
+        // right answer anyway: a host that restricts PHP to a vhost
+        // directory is not the container image.
+        return @file_exists('/.dockerenv') || @file_exists('/run/.containerenv');
     }
 }