Hi there! I understand you're seeing a "network error" when logging into the Suka app on your iPhone, and although some functions work, you're unable to make transactions. Let's work through this together.

First, just to get a better idea:
- Are you connected to Wi-Fi, cellular data, or have you tried both?
- Have you recently updated the Suka app or your iOS version?
- Does this issue happen only in the app or also if you try to access Suka through a browser?

Meanwhile, here are some steps we can try to resolve the network error and transaction problem:

1. Check Internet Connection:
Make sure your iPhone has a stable internet connection. Try switching between Wi-Fi and cellular data to see if either helps.

2. Restart the App and Device:
Close the Suka app completely (swipe it away from the app switcher), then reopen it. If that doesn’t help, restart your iPhone.

3. Update the App:
Ensure you have the latest version of the Suka app from the App Store, as updates often fix bugs including network issues.

4. Clear App Cache or Reinstall:
iOS doesn’t have a direct cache clear option for apps, but you can delete the app and reinstall it to clear any corrupted temporary data.

5. Check App Permissions:
Sometimes, the app may need permissions to access network or background data. Head to Settings > Suka app and make sure all relevant permissions are granted.

6. Reset Network Settings:
On your iPhone, go to Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings. This will clear saved Wi-Fi passwords but can fix tricky network glitches.

7. Try Logging in After Some Time:
Sometimes network errors can be caused by temporary server-side issues. Since some users have reported intermittent network issues with Suka app (similar to others in online communities), waiting a bit and trying again might help1.

If you've tried any of these already, please let me know which ones, so we can dive deeper. I want to make sure you can get your transactions working smoothly again.

Are you comfortable trying these steps now?