Workspace for iOS shows "Http/1.1 Internal Server Error 43549" after successful authentication via NetScaler Gateway.
Workspace for Windows works fine.
AAA nFactor authentication profile is configured in NetScaler Gateway.

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NetScaler fix will be available in new released build.

As a workaround, run the following commands manually.

>bind policy patset ns_aaa_relaystate_param_whitelist "citrixauthwebviewdone://" -index 1 -charset ASCII 

 

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Problem Cause

It's a known issue in NetScaler Gateway nFactor authentication scenario with BUG ID: NSHELP-33054.

The authentication failed caused by "_ns_aaa_relaystate_param_whitelist" patset strings missing in NetScaler.

e.g. 
In working NetScaler environment, below command out put should have below records included.
>show patset ns_aaa_relaystate_param_whitelist
The result should have below entity
1) Bound Pattern: citrixauthwebviewdone:// Index: 1 Charset: ASCII