Even if the server is working fine, sometimes there is some conflicts that we can identify with the healthcheck such as certificates issues etc. It look like the issue you are experiencing are similar to this issue, could you share the mobile logs? You can click on the question mark icon.
I have also a few questions for the context there.
- Did the mobile application was working previously or is it a new mobile configuration?
- Have you updated to the latest passbolt mobile version? We released a new mobile version last week.
- We recently released Passbolt v4.6.0 is there any reasons for not updating to the latest version?