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Cura 2.7.0 and 3.0.3 doesn't start

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I'm also having an issue with launching Cura 3.0.4 (The problem started from the 3.7 update). As soon as Cura is launched it exits. The only way I can start the application is by disabling my wifi connection. It then starts normally but the moment I enable wifi again the application exits again.

I have whitelisted Cura in the Firewall setting but the issue still persists. This is occurring on a MacBook Pro macOS version 10.12.6

This is the stack trace

Thread 0 Crashed:

0 libsystem_kernel.dylib 0x00007fffa6bddd42 __pthread_kill + 10

1 libsystem_c.dylib 0x00007fffa6af4497 raise + 26

2 libsystem_platform.dylib 0x00007fffa6cbeb3a _sigtramp + 26

3 ??? 000000000000000000 0 + 0

4 com.apple.CFNetwork 0x00007fff905e95c4 PAC::PACClient::invokeClientCallback() + 102

5 com.apple.CoreFoundation 0x00007fff91347321 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17

6 com.apple.CoreFoundation 0x00007fff9132821d __CFRunLoopDoSources0 + 557

7 com.apple.CoreFoundation 0x00007fff91327716 __CFRunLoopRun + 934

8 com.apple.CoreFoundation 0x00007fff91327114 CFRunLoopRunSpecific + 420

9 libQt5Network.5.dylib 0x0000000109114d75 0x109070000 + 675189

10 libQt5Network.5.dylib 0x0000000109115b51 QNetworkProxyFactory::systemProxyForQuery(QNetworkProxyQuery const&) + 17

11 libQt5Network.5.dylib 0x000000010910b753 0x109070000 + 636755

12 libQt5Network.5.dylib 0x000000010910d842 QNetworkProxyFactory::proxyForQuery(QNetworkProxyQuery const&) + 50

13 libQt5Network.5.dylib 0x00000001090a155e 0x109070000 + 202078

14 libQt5Network.5.dylib 0x00000001090bf329 0x109070000 + 324393

15 libQt5Network.5.dylib 0x00000001090c4283 0x109070000 + 344707

16 libQt5Network.5.dylib 0x00000001090bbdee 0x109070000 + 310766

17 libQt5Network.5.dylib 0x00000001090bba9b 0x109070000 + 309915

18 libQt5Network.5.dylib 0x000000010909fed5 QNetworkAccessManager::createRequest(QNetworkAccessManager::Operation, QNetworkRequest const&, QIODevice*) + 1653

19 PyQt5.QtNetwork.so 0x0000000108fccef1 sipQNetworkAccessManager::createRequest(QNetworkAccessManager::Operation, QNetworkRequest const&, QIODevice*) + 129

20 libQt5Network.5.dylib 0x000000010909e2de QNetworkAccessManager::get(QNetworkRequest const&) + 30

21 PyQt5.QtNetwork.so 0x0000000108fcdd01 meth_QNetworkAccessManager_get(_object*, _object*) + 113

22 nl.ultimaker.cura 0x0000000108a9f0a5 PyCFunction_Call + 165

23 nl.ultimaker.cura

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