diff --git a/gns3server/controller/__init__.py b/gns3server/controller/__init__.py
index d8f0f229..6608838a 100644
--- a/gns3server/controller/__init__.py
+++ b/gns3server/controller/__init__.py
@@ -291,7 +291,7 @@ class Controller:
                 log.error(f"Cannot read Etag appliance file '{etag_appliances_path}': {e}")
 
         # FIXME install builtin appliances only once, need to store "version" somewhere...
-        #if parse_version(__version__) > parse_version(controller_settings.get("version", "")):
+        #if parse_version(__version__.split("+")[0]) > parse_version(controller_settings.get("version", "")):
         #   self._appliance_manager.install_builtin_appliances()
 
         self._appliance_manager.install_builtin_appliances()
diff --git a/gns3server/crash_report.py b/gns3server/crash_report.py
index cde05b5b..3a512247 100644
--- a/gns3server/crash_report.py
+++ b/gns3server/crash_report.py
@@ -83,13 +83,17 @@ class CrashReport:
             # Don't send log records as events.
             sentry_logging = LoggingIntegration(level=logging.INFO, event_level=None)
 
-            sentry_sdk.init(
-                dsn=CrashReport.DSN,
-                release=__version__,
-                ca_certs=cacert,
-                default_integrations=False,
-                integrations=[sentry_logging],
-            )
+            try:
+                sentry_sdk.init(
+                    dsn=CrashReport.DSN,
+                    release=__version__,
+                    ca_certs=cacert,
+                    default_integrations=False,
+                    integrations=[sentry_logging],
+                )
+            except Exception as e:
+                log.error("Crash report could not be sent: {}".format(e))
+                return
 
             tags = {
                 "os:name": platform.system(),
diff --git a/gns3server/utils/images.py b/gns3server/utils/images.py
index 5d7f0c9c..629aca33 100644
--- a/gns3server/utils/images.py
+++ b/gns3server/utils/images.py
@@ -247,6 +247,7 @@ def md5sum(path, working_dir=None, stopped_event=None, cache_to_md5file=True):
 
     try:
         m = hashlib.md5()
+        log.debug(f"Calculating MD5 sum of `{path}`")
         with open(path, "rb") as f:
             while True:
                 if stopped_event is not None and stopped_event.is_set():