Catch urllib3 exceptions when sending crash report. Ref https://github.com/GNS3/gns3-gui/issues/3483

gns3server/crash_report.py

@@ -29,6 +29,7 @@ import struct
 import platform
 import locale
 import distro
+import urllib3
 
 from .version import __version__, __version_info__
 from .config import Config
@@ -82,11 +83,15 @@ 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 urllib3.exceptions.HTTPError as e:
+                log.error("Crash report could not be sent: {}".format(e))
+                return
 
             tags = {
                 "os:name": platform.system(),