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July 14, 2026
Question

Unable to Open Process models after Community version upgraded to 26.6

  • July 14, 2026
  • 9 replies
  • 0 views

Hi Appian Folks,

After community version got upgraded to 26.6, I see process models are not opening at all. Is anyone facing the same issue?

504 Gateway Time-out

9 replies

stefanhelzle0001
July 14, 2026

I suggest to write to community@appian.com communityedition@appian.com

Modified the email address. Thanks [mention:b45a4f6a20b14a008e4e0ec732a8bf98:e9ed411860ed4f2ba0265705b8793d05] 

mikes0011
Brainy
July 14, 2026

additionally, last i heard, issues with community edition in particular can be sent to the inbox "communityedition@appian.com".  maybe worth just sending it to both.

July 16, 2026

I did it before I post here. Still waiting for Response from Appian Team. As of now, I still see the issue. Process Models are not opening up.

July 14, 2026

Hi, I am also facing the same issue after my Community Edition was upgraded to 26.6. Existing process models and newly created process models both fail to open and return a 504 Gateway Time-out. Please let me know if there is any update or workaround. Thanks!

July 14, 2026

Hello, I am also facing the same issue after my Community Edition was upgraded to 26.6. Existing process models and newly created process models both fail to open and return a 504 Gateway Time-out. 

July 16, 2026

Hello, I am also facing same issue for existing and newly created process Model, getting 504 Gateway Time-out error. Need Assistance to resolve the issue, Thanks.

mikes0011
Brainy
July 16, 2026

same seems to happen for me - i'm assuming it's an environment problem.

July 21, 2026

We are experiencing the same issue after upgrading to 26.6. Process models return a 504 Gateway Time-out. Did anyone identify the root cause or receive guidance from Appian Support?