Socket I/O timed out when connecting to nextcloud

[Naadiyaar]

Describe the bug
I'm not able to connect to my nextcloud instance and instead facing an error. it worth mentioning there's no problem connecting to the same instance using GNOME settings, browser and on Android.
Also tried with internet from multiple ISPs and with/without proxy

To Reproduce
Steps to reproduce the behavior:
Go to:
preferences
integrations
click on + button and select NC
enter log-in information
click on Log in
see error: unknown error http 24 Socket I/O timed out

Expected behavior
Connect to NC

Screenshots

Desktop (please complete the following information):

• OS or DE: Fedora 40 GNOME 46
• Version [4.11.6] flatpak

[oktayacikalin]

How does the URL you're using in Planify look like? (plz obscure parts if necessary)

Are you using the same in GNOME and on Android etc.?

Are you using some kind of firewall?

[Naadiyaar]

How does the URL you're using in Planify look like?

https://use07.thegood.cloud/
Also without the protocol part, and same shape of url with my personal NC instance.

Are you using the same in GNOME and on Android etc.?

Yes

Are you using some kind of firewall?

yes I'm behind a very strict firewall. But all of my devices are, and even previous versions of Planify worked flawlessly.
(I don't remember which version but I will add info if found out)

[oktayacikalin]

yes I'm behind a very strict firewall. But all of my devices are, and even previous versions of Planify worked flawlessly.
(I don't remember which version but I will add info if found out)

That might be helpful! Thanks!