search user to Assign token when using proxy server: HTTP Error 500

[agrm1]

When using the web app with a http webproxy server, everything works except assigning a token: when searching for a user, a HTTP Error 500 is displayed. Curl verbose log shows no errors.

[token2]

How many users do you have in that tenant?

[agrm1]

How many users do you have in that tenant?

About 2300 users. The error does not occur when using a network without webproxy. But logging in, importing & deleting token works fine both with and without webproxy.

[agrm1]

error in the browser developer console when searching for "te" - which finds one user;

[token2]

No progress - but just to clarify that we cannot replicate the issue, it works for us the same way with and without proxy.