Prusaslicer has encountered an error  

RE: Prusaslicer has encountered an error

same here since jan 10 : prusa slicer 2.9.4 doesnt work anymore , always crashing , not responding

RE: Prusaslicer has encountered an error

Same here. Tried these fixes, but no result. https://forum.prusa3d.com/forum/prusaslicer/pursaslicer-2-0-0-not-responding/

RE: Prusaslicer has encountered an error

Same here. Also not able to log in my Prusa Account. Search for Updates also don't work. The Printables Tab in PrusaSlicer also shows an error. After some clicks on retry i am able to see the page but some seconds later there is a red stripe at the top of the page. Could not read whats written there. Don't know what to do. I have tried reinstall PrusaSlicer, disabled Firewalls, Format and reinstalled Windows 11. Installed PrusaSlicer without AntiVirus and Firewall, accepted old TLS and SSL still not working. I remember this issue a while ago but after ca. 1 week it worked all normal again. But now i have this issue 4 weeks straight.  

RE: Prusaslicer has encountered an error

Same here.
When I use VPN, then it works.

RE: Prusaslicer has encountered an error

jep, same issue here.

Happy to hear that I am not the only one...

@Admin are you aware of that topic? We need ugently any fix!!! Thanks

RE: Prusaslicer has encountered an error

Hey, thanks for the report. We already have some reports of this, but I've added all the info listed here for the devs. I'm hoping I might have some info soon

RE: Prusaslicer has encountered an error

I've determined that the problem must be with my internet connection.

As soon as I connect my PC to my mobile phone's hotspot, it works.

It also works via VPN.

I'm using a Fritz!Box router and I'm with "Deutsche Telekom". Perhaps this information will help the developers.

Restarting the router (which assigns a new IP address) didn't fix the problem.

Everything was working perfectly until two weeks ago.

RE: Prusaslicer has encountered an error

Thanks Tommy, 

regards Joan

RE: Prusaslicer has encountered an error

So guys some news from me.

First of all it all worked again for me for some time (10 min. lol). Connect to PrusaAccount via PrusaSlicer, downloading config data and Printables.

Yesterday I was looking around for this SSL/TLS issue.

One point for a save SSL/TLS Connection is a matching time code from Server and Client. As I right clicked on my networkconnection and clicked diagnosis of networkproblems the "Help" Programm of Windows told me my Systemtime was not sychronised so i googled this error and found this (sorry just in german, but the commands should be the same): 

Willkommen bei Microsoft Q&A!

Selbst wenn Ihre Uhr korrekt aussieht, können einige Netzwerkdienste (wie VPNs oder sichere Websites) immer noch melden, dass Ihre Uhrzeit nicht synchronisiert ist. So überprüfen und beheben Sie das Problem:

1 - Setzen Sie den Windows-Zeitdienst zurück

Öffnen Sie die Eingabeaufforderung (Admin) und geben Sie nacheinander Folgendes ein:
net stop w32time
w32tm /unregister
w32tm /register
net start w32time
w32tm /resync
Starten Sie Ihren PC neu und prüfen Sie, ob das Problem behoben ist.
Wenn das Problem weiterhin besteht, versuchen Sie, den Zeitserver mit den folgenden Befehlen zurückzusetzen:
w32tm /config /syncfromflags:manual /manualpeerlist:"time.windows.com" /update
w32tm /resync
2 - Ändern Sie den Zeitserver:

Öffnen Sie die Systemsteuerung > Datum und Uhrzeit > Registerkarte Internetzeit
Klicken Sie auf Einstellungen ändern > Wählen Sie einen anderen Server aus, z. B.:
pool.ntp.org
time.nist.gov
Klicken Sie auf Jetzt aktualisieren, dann auf OK und überprüfen Sie die Uhrzeit erneut
Sie können in der Eingabeaufforderung (Admin) Folgendes ausführen , um den Zeitserver zu ändern:
w32tm /config /syncfromflags:manual /manualpeerlist:"pool.ntp.org" /update
net stop w32time
net start w32time
w32tm /resync
3 - Verschiedene Prüfungen:

Stellen Sie sicher, dass Ihre Firewall oder Ihr Antivirenprogramm den Zugriff auf Zeitserver nicht blockiert. Versuchen Sie, sie vorübergehend zu deaktivieren und erneut zu synchronisieren.
Starten Sie Ihren PC neu und rufen Sie das BIOS auf (in der Regel durch Drücken von F2, **DEL **oder ESC während des Startvorgangs). Stellen Sie sicher, dass die Uhrzeit dort korrekt ist.
Es ist erwähnenswert, dass die manuelle Synchronisierung einige Minuten dauern kann. Darüber hinaus werden bei Netzwerktests manchmal Fehler bei der Zeitsynchronisierung fälschlicherweise gemeldet, selbst wenn die Uhr korrekt ist, und das Problem kann nur eine falsche Fehlermeldung sein.

My Win32time Task was realy not running. I followed this steps and set it to automatic start. I changed the Timeserver to "time.nist.gov", did a restart and tried

PrusaSlicer. I was able to download the new 2.9.5 Config, log in to my PrusaAccount and got Connect acces.

After restarting PrusaSlicer, the same issues like before happend.

RE: Prusaslicer has encountered an error

Exactly the same over here.
No connection possible on Win11. It works when connected with a VPN.

It works on Ubuntu 25.10 tough on the same device and network (without VPN).

RE: Prusaslicer has encountered an error

Hi everyone,

me again. It seems like i get the solution to fix the problem for me. (hopefully for u 2 🙂 )

So it seems the timestamp is not causing the problem.

I am normaly connected via Ethernet-Cable. So i tried connecting to Prusa via WiFi and this worked.

I have 2 Network Cards. One for Ethernet, the other onboard for WiFi.

Switching back to Cable --> Problem.

WiFi -> working

Cable via VPN -> working

Turn off IPv6 for my Ethernet-Card without VPN --> working

WIN+R
Rightclick on your Internet Connetion
Properties
Scroll down to Internetprotocoll Version 6(TCP/IPv6)
Deselect
Click OK

I hope this will help u 2 to get back to Connect via PrusaSlicer 😀

IF this is realy the problem, then the question is why all of a sudden? I've changed nothing on my system and all of a sudden I was not able to connect again until today. It still is Version 2.9.4 of the Slicer. Today I've dowloaded Config 2.9.6. I don't know if i dowloaded a Config Update befoe the problem occured. 

RE: Prusaslicer has encountered an error

sorry 

WIN+R
ncpa.cpl
Rightclick on your Internet Connetion
Properties
Scroll down to Internetprotocoll Version 6(TCP/IPv6)
Deselect
Click OK